+1
Another problem in 2K10 is they don't take into account body momentum/wingspan/athletic ability in 2K10. Seems like 2K11 will incorporate this.
Also in real life if you contest too closely or aggressively, usually a slap of the hand/arm occurs or you bump into the offensive player. This of course will mean a foul. In the IGN trailer Jeff Green fell down when the defender contested his jumper too closely. This never occured in 2K10.
Last but not least was some of the jumpshots were so slow and unrealistic looking that they would always get blocked.
Shot contest was a problem in 2K10 but I believe 2K11 will be more realistic.
We already know about momentum jumpers being added to the game. Along with momentum jumpers after reading this preview, it seems like jumpshots will look different depending on how long you hold the button/shot stick. This will be useful when defenders are playing tight/need to get a shot off/etc.