I proved a theory to myself while playing a game in beta last weekend. I went 5 kills, 17 deaths, and yet ended up 2nd overall in points. I did this by helping out my team using my kits specailty rather than going for kills.
I was worried, always seeing the top scoring player also having a good k/d ratio and wanted to find out if I could get to the top by supporting instead of killing.
The medkit/defib were always my favorite in BC2, so was support. So, with a combination of medic kit, defibs, and ammo boxes I was able to get to 2nd place overall on my first try, just by being diligent in my supportive role. Not only was it easier than I expected, it was a ton of fun. I think a lot of people are just afraid to try the supportive role.
I encourge more to try this when the game is goes retail. I feel confident that the general bf3 players playstyle will move more towards objective/team support than just k/d.