I can confirm this. I'm (self-)learning to play drums, and since I'm still a noob, my synchronization of foot and hand is a little off. When I'm just fooling around on the kit, I don't notice these imprecisions. But once I get "in the zone" with a metronome and all, I can tell exactly every time I hit the bass drum a fraction of a second earlier/later than the hi-hat, and the feeling that follows immediately is a slightly unpleasant one, like when you commit a social faux pas. It's a curious shift of perspective, and such hypersensitivity happens to me when I get immersed in code too, so I guess it relates to concentration itself.