Couldn't one do what you're describing with a Google Code project that uses Mercurial? Or at bitbucket.org using Mercurial? Or at launchpad.net using Bazaar?
I don't think StrawberryFrog's question has been adequately answered: "what's with the assumption that github is the one true way?..."
(disclosure: I work for GitHub)
I'm pretty sure the question was meant a bit more loosely, not as a direct challenge to someone's post here, but to the general prevalence of a meme that roughly fits that description. I certainly wouldn't suggest grepping for that phrase as a method of getting a feel for its virulence out "in the wild".
Instead, look or tacit assumptions, misattribution's of value, and conspicuous omission of alternatives. I guess good, old-fashioned "reading between the lines" is what I'm suggesting.
A pretty dramatic illustration popped up on my RSS reader this morning. Someone submitted a HN article with the title "Jeff Atwood's open source contributions", which was nothing but a link to http://github.com/codinghorror - which currently shows zero projects. It was quickly flagged here at HN, but it lives on over at Reddit.
http://news.ycombinator.com/item?id=1023696
The tacit assumption here is that if Jeff has zero repositories at GitHub, then he has made zero open source code contributions.
I don't mean to detract from how cool it is that your product is so successful. (Kudos!) But its fans often have a creepy blind spot to alternatives, in my opinion.
Not to take away from GitHub being good, but I'm asking what makes it seems that good.
I put a new code on Github and it seems all right. But I'm not going to move code that's been hosted elsewhere for several years even if something slightly better comes along. Consistency is a virtue.
No, I don't think anyone did. pohl's comment that it's meant about "the general prevalence of a meme that roughly fits that description" is about right.
because of the general uptick in contributions when code is hosted there.
Github is a slick and friendly home for open source, even if the Windows Ui tools for git still need a lot of polish. But do you have numbers to back that idea? It could well be true, who knows.