The infamous e-kills, in most other games (such as first person shooters a la www.quakelive.com , which is free and it roxx btw) they would be called assists. It means the killing of the enemy at the crucial time when your team mate is near the base and can score.
In quakelive you get 75 points for it, if I'm not mistaken, as opposed to 100 points on you get for a cap.
I can see how you would value each cap a tad bit more, but having said that, the timing of the kill, especially on jj2, is crucial, so I can see why CC-ers mention it in their reports, because it is pretty darn important.

Speaking of which, any1 got logs from yesterdays CDF vs GpW game? I wanna see my e-kills and scores

EDIT: I noticed the "wrong" anomaly - the 8-D game.