I find it all funny lol.
ALL ELITES ARE NOOBS!!1111
-Halo 3 Playerbase
The problem with k/d is it gets harder to change as you go along, so it isn't really accurate of skill.
For example, say someone has a k/d of 0.8, with 8 kills and 10 deaths. He only needs to get 2 kills without dying next match to raise it up to 1.0
Someone with 1600 kills and 2000 deaths needs to be constantly scoring way above 1.0 per game just to increase his overall to 1.0. He may be getting 5 k/d per match, but his overall still says 0.8 because he has to play hundreds of matches to make it go up.
By the time he's done that, he's probably improved drastically at the game, but because of the high requirement his k/d has he will be depicted as a "0.8 k/d scrub" for a long time, because it only gets harder as the numbers get bigger.
[Edited on 03.10.2012 8:55 PM PST]