When I hear something about cheats, I want to puke. I believe no one cheats in both clans and clan war (or clan wars) will be played in friendly atmosphere, as Ken said.
I play with 60 fps with vsync=true (so, Poor's mod works for me) and I don't complain someone has 100 fps. Where has gone fun from the game? People forget games were made to make fun and they are interested some numbers. If someone is just good, always anyone else must say, he uses cheats...
I've known Kiki longer than anyone else. I met him for the first time, when I was 16 or 17 (it was 2006 or 2007). He was beginner in these times and bad/medium player. I played with him and PolishEagle on my private server with GODZ Sever settings. Then I leaved DXMP and I came back in 2009 or 2010. I was pretty in shock, he made so big progress. He became great player and all community respected him.
Few months ago he admitted that he had 200-250, but he capped it to 150. I have no doubts he was honest. You must understand it, his aim is really good and he kills fast, because of it. Of course, he has 150 fps, so still cheats (I have 60 fps, the difference is visible), but I am too lazy to install some OpenGL or something like this. I know his 150 fps is small advantage only, because he is complete player, he make a mistakes very rare.