It's really strange because I went negative in nearly every game we played in that session, but I'd been playing all day before that and was doing really well (apart from one game where I got destroyed..something like 0 and 8, the other team got almost no deaths between them in the entire game and the game was over in about 4 minutes haha).
I see a lot more skilled players on this than on Gears 3. The balance between casuals, crap players, average, good and great players was pretty even on 3 but here it feels like 60% of players are at least very good and likely MVP candidates and there is usually a max of 1 below average player in a game.