Every single one of my friends says that they absolutely hate it... they're getting bored with the series and they really need some new features. They dont like Survival, because they say it feels like zombies only they move faster and they shoot you.
Like you said they sold the copies, but I think that they are losing steam through all of the negative feedback that I am getting.
I never planned on getting it in the first place, but now I am definately not getting it, and I do not recommend that anyone else does as well. Go get battlefield, its a guarenteed win once you start playing it like a battlefield game.
I haven't put my hands on the game, and I think the only reason that I would is to slam it into pieces with a 8 pounder, or to shoot it rambo style out of a nerf disk gun. Imagine loading up $2000 worth of MW3 disks into a nerf rifle and shooting them carelessly everywhere. I love the idea personally!!
# Jumpnjack :
Whenever I play MW2 online as a Russian and hear the words: "Friendly AC-130 above" I wonder how the Russians hijacked an American gunship plane 
you made me laugh with that, it reminds me on how awesome BF2 was with the voices and how the Americans spoke English, the Arabs spoke arabic, and the chinese spoke Chinese. I loved it :)