I heard something about a Speedhack, it doesnt seams to be a Speedhack because you wont work faster but you can turn your Ping what ever you want, maybe an Example:
I turn with this Speedhack my Realping to 0, so when i see a enemy, i can kill him there, without lag and he dont see me coz i stay not really there, however tonight ill load the screens up, dunno where he get such like this but it would be nice to find it.