Kill/Death Ratio

K/D is one of those things you can "theoretically" judge a player's skill. It takes some time to improve it as well. Now, it's only a theoretic way to judge skill because:

a. Farming increases K/D. If someone farms just that little bit to stay above 2.0 K/D you won't notice it immideatly.
b. If the player stays in generally lower skilled channels, his K/D is going to increase. For example, the difference between Bravo 8 and Echo 8 is somewhat enormous. Same goes for Forum rooms usually. Whenever I get a 5.0+ K/D against noobs, I may get a 1.0/1.5 K/D against truly skilled players.