Well, Yao's individual performance can't represent all Chinese players. For those that can play at the professional level, a lot of Chinese players are as tough pound for pound. Yao is just too big and too timid. If you take a look at Yi, he can hold his own. Maybe if you compare him (Yi) with Lebron it would be true, but again, Lebron is freak, hes more aggressive and athletic than anyone in the league. Most foreign players focus on the fundamentals, ie free throws, shooting, passing. You usually dont see them elevate and try to dunk on everyone. Also, the "Americans" your referring to are black people i presume? Compared to others, african americans in general are just built for sports.
im sorry but yes american players are more aggressive, its in our human nature, we were built this way. look at china, no murders, over populated=no fights, murders, etc. everyone is nice and mannered. i somewhat agree with the fundamentals but teaching on that and not pushing being aggressive has somewhat to do with how they are bred, raised, taught.
i agree, yao is very slow but he gets injured alot. Yi? still too early. There is only a couple chinese so we will see when there is more in the league.