yeah same here this is what iam seeing     

1. host lag/framerate

2.full clip into someone watch kill cam didn't even fire a shot at him running upto 2 secs behind whats happening

The only time I seem to lag is when I am playing really late at night/early in the morning.

On release night I played from 12:30am EST to 7:30am EST, and the connection started to steadily decline from about 5am onward when people in my time zone started to go to bed. I played from like 5pm to 10pm last night, and didn't have any issues. I took a break to watch Sons of Anarchy, and hopped back on around midnight and the connection was a bit off again.

Basically, when the majority of the lobby isnt form the United States my connection seems to suffer

Personally I think MW3 is better than BO as far as lag goes, actually I don't have any doubts BUT I think their lag compensation still needs some adjustments. I'd say it's probably in half the games I play where I die instantly like I was shotgunned to the head (like OP said) and then watch the killcam and see the guy was shooting at me for a while. With everybody playing with the automatic stopping power that this game has in comparison with BO, if that's happening you have NO chance and like I said this happens in half the games I play. I'm guessing that it's due to lag compensation which I think they need to tone down a tiny bit. I live in the center of Madrid a city of over 5 million and when I played BO I hardly got grouped with Spaniards and even when I did there were few, a lot of times with Europeans but that doesn't mean they are close. With MW3 I play with almost exlcusively Spanish people with the occasional Portuguese players, everybody with at least 3 bars, so that is a great sign. They went back to the ping parameters for searching for games which worked great for me in MW2 so that makes me think that the lag comp is the culprit. I know the servers are saturated and I hope that has something to do with it too but dying before you know what's even happening sucks!