Why do you find it surprising that a lot of people have been playing since CoDs before CoD4? CoD2 was one of the first shooters for the Xbox 360; I'd imagine a lot of people who got the Xbox 360 when it first came out ended up buying CoD2 as well.
Some people are way too impressed by their "CoD pedigree,' as if that means anything in a game with no learning curve.
Protip: If you don't see gorilla coming he's already behind you, lotion bottle in hand. --CaPwnd
Call of Duty 4: Modern Warfare was my first CoD game but it made me so frustrated, I raged quit CoD and went back to Halo 3 until MW2 came out. Then I liked the series from there. And I am a casual gamer.
Xbox 360 Gamertag: TDPNeji Steam name: NejiHyuga900