Yes, it does. The fact that I'm in vehicles at appropriate times means that I know how to utilize my resources appropriately, and switch between infantry and vehicles on the fly. My KDR, SPM, KpH, Accurancy and pretty much every single stat is higher than his. It's not KDR alone. Edit: That said, you have to account for resource boosts when looking at SPM. THAT said, around 120 SPM seems 'average' for non-boosted players.