There's no way you can do that many CTF matches in that little of a time, unless you play 24 hours per day, against AFK enemies... If that's the case, then I think this is a botter. After all, all you would have to do is to find your coordinates, navigate your way to the other team's flag, get back (safely?) and keep on doing that. If the person IS a botter, then there's also a possibility that he didn't do a stat reset, and that really is all of his kills, because there is no need to worry about getting shot if the enemy does not shoot.
Edit: Oh wait, he has 24,790 kills with the P90TR. Screw the botting idea. Hooray for stat resets >_>. In order to rack up that many flags, this person must have played... too much. Hooray for no-lifes.