Here are somethings that happen to me.
-If im running it was freeze for another 5-6 sec and i get killed.
-I can't no get any killstreak at all.
-By the way i've a very good internet connection so i dont think its because of that.
Same things here, the killcams even lag for me, I get waaay too much frame stuttering and rubberbanding, hell I go to shoot at a uav and it even lags!! The final killcam always freezes for a second or 2 as well....sux!!
I had the frame stuttering once in awhile in MW3 but now its almost evry game!!