My main issue the MK9 training is when you set the dummy to just block. It seems like there's a 1 frame delay before it will actually block sometimes, so you'll find something you can do consistently on a blocking dummy but it wont work once a player picks up the controller, annoying as shit!
Haha it surprisingly the opposite in doa2-4. The ai recovers 1 frame before a user can unless you set the ai to an ai level.