"Break-in period" is certainly widely believed among guitarists, and I believe it myself (based on the experience of owning new guitars and playing them until broken in), although it's near impossible to measure. The instruments seem to change noticably in both tone and feel as they get played.
My favorite instruments generally are upwards of 30 years old and have been played extensively. I had the pleasure of playing a 50 year old Gibson SG recently, and it was fantastic - far better than any modern SG I've played. Why is that? It's just wood, metal, and glue. It's not made any better than a new SG. So I think age and playing really matter.
Beyond that, my own instruments seem "angry" if I don't play them for months on end. They don't like just sitting there. This is, of course, a very animist, non-scientific approach to the issue, but it seems very real to me.
The other factor is I'm sure back when Gibson and Martin were US-made, there was a certain amount of QA that went into each unit that went out the door. I know some fine men who make their living off craft furniture for the bourgeoisie and every unit is meticulously inspected. I'm sure even if they attained commercial success, they'd ensure a base level of quality that a MNC like Ikea or West Elm probably doesn't have. In the same way you have an emotional attachment to your instruments, those instrument craftsmen/women have a similar bond/sense of pride.
Also, as a woodworker, I can tell you that there are so many contributing factors to wood, ranging from completely obvious spruce vs cherry vs sikta, to more subtle things like where the tree was harvested from, access to water, the way it was cut (quarter-sawn? flat? did the craftsman just select whichever was cheapest?), the way it was cured, in what environment, and for how long. These all contribute to the way they age, the way they cut. It's not unlike wine vintages and variations (which, incidentally, have a fetishized community, but certainly an amateur like myself can identify the difference between two bottles of the same grape and vintage, but of a different region). New SG's are produced in an assembly line with the cheapest acceptable materials, rather than having some skilled tradesman who went down to 4 different lumberyards spending 6 weeks picking the best wood stock for that years production.
One of my favorites is a well-played 1980 Tokai. In its day, it was a "cheap guitar", considered inferior to American instruments, but it's magical. It's better than Fender Custom Shops I've played - but I imagine 35 years from now, they'll be much better.
Is it possible you (have to) play them slightly differently? I know that is my experience--my hands know the violin and guitar better than my brain can understand.
That said, the idea that there's no difference between a great old instrument and a modern one is just as fallacious. Perhaps as a not great violinist you never got to the point where you got to find out, but there are qualities of an instrument that have nothing to do with sound. The fact that a Strad costs $5 million and an Iizuka costs $27,000 is ludicrous, yes. But the great old instruments are still around for a reason.
I think it's commonly accepted amongst collectors that you're buying a Strad because it's a Strad. They're not buying it for it's sound any more than one would buy an 1894 Patek Philippe because it keeps time. (A 20 dollar quartz Timex does just as well.) You're buying a piece of history. A piece of art. In the case of a watch, you're buying a piece of a combination between history/art and engineering. Watch this[3] to see the engineering beauty in it all. If you're further interested, watch this traditionally trained German[4] to see how delicate[5], how precise, how intricate his movements are, despite having lost the steady hand he had at 35, he regains the fluid motion in certain strokes.
[1] Humidity control, minimize temperature fluxuation, peg maintenance, etc. Just the basics - you don't have to baby it, but obviously don't neglect it either.
[2] I don't know what the current scene is like, but take the 1960s Yamaha FG180's which were basically thought of "junkers" you'd buy your 8 year old for Christmas. A mint Red Label with no neck warpage can get 3 or 4k easily.
[3] https://www.youtube.com/watch?v=8OViP9AR2HE
[4] Or Swiss (?) I don't know German well enough to distinguish regional accents, so he could be from the German-speaking region of Switzerland.
To what are you referring? I was under the impression they were so prestigious as works of art and history, not necessarily as better violins.
What is your thought on this, having played the violin?
Though you didn't ask me, what are my thoughts? The burden of proof is upon the ones making the claim. Prove it instead of causing endless debate on the internet. No one has, of course, just like no one has proven that a $1500 ethernet cable makes your sound system sound better. IMO, there are a lot of things that can ruin an instrument. Dry environment (causes cracks in the wood). General neglect, fiddling with bolts you shouldn't be fiddling with. But being played by a novice is not one of the things that can ruin a wooden instrument. It's all smoke and unprovable subjective opinions.
Let me put it another way: the best mandolin I own sounds better when an expert player plays than when I do. Not just the skill of the playing of the piece (the expert and I can play a scale at a slow tempo for this demonstration), the actual sound of the instrument. Did the mandolin suddenly transform its sound because it knew a good player was holding it? No, of course not. What we have demonstrated, however, that an instrument doesn't have just a sound. Lots of things contribute to the sound, including who is playing it.
I had a conversation with a freind who is working on a DMA. He and his wife had visted to play a concerto with our local orchestra (I play bass, my wife runs it and conducts). The guy is a fantastic player.
He's upset because his teacher has about $1M dollars in her setup, and he believes that if he had the same setup that he'd play the same as her. She was given this setup at about age 17, by her family.
I think that my playing and practice strategies would be a lot different if I owned an instrument that I could "pas on " to the next generation of players ang have a guaranteed retirement. So on the point of having that instrument I agree with my friend.
But I don't think that we agree on why that would change his playing.
On a related note, I call my wife's playing has improved when she moved from a $2500 antique instrument to a modern instrument she paid about 15K for, which she paid for though her earnings as a performer. In this case, we are in agreement that social and personal effects are important. Of course, she sounds objectively better with her better instrument, but this particular instrument is a materiel improvement over her old one.
So while there differences in instruments, I don't know if it is possible that "how good" the instruments are can be isolated from their situation between player.
For my part, I started getting a lot better gigs when I started using a markbass and an american p-bass with flats... I dunno. Folks listen with their eyes, I guess. I know that is true about the double bass folk and blues gigs I play on upright but would rather play on electric.
It sounds good, but no better than you'd expect given his ability, which is dedicated amateur level.
http://www.thestrad.com/cpt-latests/blind-tested-soloists-un...
(spoiler alert: a modern violin won)
Samuel Zygmuntowicz (a modern maker) has remarked, Strad made new violins. It's a reminder that age has little to do with the quality in some fine antique instruments. Strad's craft to fabricate brand-spanking-new violins made him quite a wealthy man (because they were fine instruments then, as they are now).