It really can't be built into ratings, there is no way you can say the sim engine factors in when you have a 6'4 player guarding a 6'11 post player. All the sim is looking at is ath/sp and D vs LP in those situations. And if the 6'4 player is more athletic and has a very high D rating he'll be able to play pretty good D on the 6'11 player who is also athletic but not as athletic and is a very good LP player. When in reality the 6'11 guy would absolutely dominate the smaller player. Just imagine Ron Artest defending Tim Duncan, in this game Artest would be able to matchup very well with Duncan but in real life Duncan would destroy him.