This was from the Hoopsworld preview:
You can read preview here:
http://www.hoopsworld.com/Story.asp?story_id=13869. It seems like every new preview I read that involves interviewing the developers, they state that they captured 9,000 new animations for this game. They never give a disclosure stating that only SOME of these were captured for 2K10. I wish a 2K developer would come on here and clear this issue up a bit.