I stand by my observation that aim-assist in this game is stronger than any previous installment. No evidence, but its just what I've felt.
The up-close assist is definitely FAR from any other Call of Duty. In the other games I could smoothly transition to the guy that just ran past me at a corner. In BO2, forget about it. I'm better off just running away than trying to turn around at 1/6th my sensitivity.
Literally everytime somebody runs past me the damn aim assist shoots my view to the floor, and I can even look back at him before he shoots me. I've also noticed that more times than not the aim assist will carry around corners.