I think I'm currently at a .88. I'm just about 400 kills under a 1.0 K/D:R. It's took me about 70 to 80 hours of game play on Black Ops before I started getting better and broke the 1.0 K/D:R ratio. My old PSN account is up to a 1.09 now, when I first started keeping track, I was down at a .65.
So I'm sure as I invest more hours into the game I'll eventually get better. It's all about learning the maps, plus adding new tactics to my game play. I am my own worst enemy when it comes to CoD.