The revamped passing shows up in nearly every instance when the clock is moving. Almost as noticeable as the new Precision Passing, however, is what happens after the whistle blows. There’s a new post-whistle “chippy-ness” that is hard to deny in NHL 10. For instance, you can totally “face wash” Ovechkin with a stinky glove, if you so desire. Now, you had better be ready to fight, but let it be known that such shenanigans aren’t out of the question in NHL 10. Shoot on an opponent’s goal late, poke at a star player post-whistle or board a player well after he dispossesses the puck, and you can rest assured that a tussle is about to ensue.
http://previews.teamxbox.com/xbox-360/2355/NHL-10/p1/
Source: TeamXbox