I'm not trying to start a console war, but here's what I noticed.
The Xbox has horrible hit registration, making half of my shots not even count as a hit.
The PS3, for some reason, doesn't have this problem.
The connection is almost always terrible. I used to have a 4-bar every game in MW2. Here we are in Black Ops, my connection is still climaxically good, I get a 2-bar, because someone with a stuff connection is host.
The killstreaks are horrible. The higher killstreaks aren't even worth your time. I get a gunship, it's taken down by Ghost Pro bitches right when I get to the map. The Dogs are ok, but not as good, Because of this, I just run Spy-plane, Counter Spy-plane, Blackbird setup.
If they took out theater mode, I'm pretty sure the lag wouldn't be as bad, since we wouldn't have millions of pictures of 5-year old kids t-bagging someone they killed, and attack dogs humping the person they killed.
Ghost bitches camping in corners. I can't stand these guys. I was shooting at someone with Ghost, they run to a corner, stuff out a motion sensor. As soon as they do this, I get a random lag spike thanks to the almighty treyarch, lose my position on the guy in my sights, he kills me.
In short, Treyarch and Black Ops can get on their knees and suck my richard. This game makes me so mad, I miss Modern Warfare 2. Yes, I said it. MW2 is better than this. I usually don't get mad about video games, but this one has me ripping hair off my head, offering it to poor children to keep them warm, and saying, "Nope sorry, Treyarch loving STOLE IT FROM YOU!"