Well I don't know what it is different from the ps3 to the 360 but on the ps3, I can more than often not get more kills than deaths, but the 360 seems to be that i'm lucky to get 2/3 kills a game. Really frustrating.
Problem is i'm progressing through the ranks fine with similar scores, don't know how like, have 2.3 hours playtime and rank 18, but my biggest prob is all the people out kill farming thinking it's the be all and end all, there's a lot more it seems on the 360, makes me want to have a few games on the ps3.