I would chalk it up to awareness (not the perk). The fact I know where to expect enemies, where to flank, and where to make a stand. I usually start each match bad, but when I learn who I'm vsing I can jump to a 2.5+game. Even easier in OBJ game modes.
Put Ya Guns On! After all...What've I got to lose? GT: The God Arm ---
I pride myself on my awareness and gun play. I'll be watching friends play, and I'm constantly pointing out enemies they aren't seeing. Then there is my gun play. I main FAL w/o SF and SWAT and hold 2.5+ k/d with each. I like to think I can outgun the competition pretty well.
We'll settle this with violence. Come on, give it all you got. We'll settle this with bullets. Go ahead, take your best shot.