Forget the bad sound, iffy gameplay, and all the other irrelvant whines.
Hows the lag in multiplayer? Better, worse, or the same as MW3?
The game seems to run much smoother. It has the option to install textures to hard drive.
I have not noticed 2-3 sec lag like MW3, however it's still laggy. Also, some really bad spawnings. Hope, it's just first day issues.