And mental, think about something like chess! In general it's just incredible how good we can become at anything. It's kind of interesting to think about in times long past where warfare was melee based and how there would have been similar outliers. Somebody who lucked into some good genetics, good diet, and good training would have been a mountain among men.

I think there's a reason most top Tetris players are kids. There's no way an adult could achieve the same level of hand-eye coordination, no matter how much they practice.

This is also why young players are generally better at first-person shooters, and why I'm unlikely to stay alive for more than a minute in CoD. ':)

I'm not sure if the parallel with the virtuosity of musical instruments was intended, but in any case one cannot disagree.