John Berardi wrote awhile ago that you'll never see the NIH doing tests on bodybuilders because, well, they're in shape.
That's too bad because it would be interesting to know how much the average human male (or female) can ultimately be able to bench/squat/deadlift.
Can any regular American guy go from doing no excercise to beginning a lifelong lifting regimen and being able to squat 700-800 or more lbs?
It takes inborn talent to compete at the higher levels of any sport, so truth be told, to reach the utmost echelons of lifting one must have some genetic help.
The question is that at what stage in lifting, do you think, does training end and traits begin?