The biggest thing I've noticed isn't lag in terms of people "jumping" around the screen. It's been really, really poor hit detection. Shots that usually register as hits give nothing, clear headshots give nothing, it's really frustrating. Don't get me started on the phantom melees, the last game I played I stabbed a guy 3 times, did zero damage, only for him to then turn around and shotgun me. I even recorded it I was so baffled, after reviewing the video, I clearly hit him 3 times, all 3 even have hit markers. Ugh.