16 hours, got about 9 into MW3 MP which my family picked up the same day. I love Skyrim, but I am a bit disappointed that it's not the awesomeness that I thought it would be ... not enough to keep me completely away from MW3. It's still a pretty damn great game overall though, 9/10 so far for me.
edit: I don't want to downplay this game, because it is awesome, just not as awesome I was expecting it to be. It is awesome though!
