I'd say anything above a 0.80 is impressive in AW, especially since the extra movement wreaks havoc for some players.
KD ratio does not matter a lot for me.Currently my KD ratio is 1.67 which is enough for me to enjoy the game.Sometime I wander for many miles away in search of enemies.That's why my KD ratio is not so good as others have.
My K/D is 0.51 i don't normally go on a rampage killing other players because am not a professional shooter and my stealth skills are extremely low...#the life and times of a noob