ya I think it is a new scoring system..well I wouldnt say system. I think you get more points for stuff. I was defibbing people and got 100 points for it. You get points for teammates spawning on you now too.
Thats good then, I hope we don't rank up quicker. At first aI thought BC2 took ages to rank but once you get used to the game your SPM increases by a huge amount, I'm sure the same will be for BF3 unless you already know how to get high scores from BC2.