I'm a decent chess player. 1600 elo over the board, 1800 online. I think the conclusions reached give too much time to non-critical moves and not enough time to critical moves.

Let's take the 90 minute game, where it's suggested to use 88 seconds for opening moves, 165 seconds for non-critical moves, and 330 seconds for critical moves.

330 seconds (5 1/2 minutes) is too short for the critical position in a 90-minute game. I would be comfortable using about 15-20 minutes for the most critical move.

I think my disagreement stems from the author's estimate of "7 or 8 critical moves per game." That's too many in my experience. In a 40 move game (the average), that's 18.75%.

I'd say there are typically 3 or fewer critical moves per game. And there's no need to spend anywhere close to 88 seconds in the opening. When you're in theory, you can bust those out in a few seconds.