Its NOT relevant.
Granted, he may be very good, but using a character switching hack (which more than a few have accused him of), as opposed to an aimbot or wallhack (which hes not), makes this irrelevant.
He may very well have played in CAL. At least thats what he says, has he given you any reason to trust him?
The point im getting to here is, even if he did play in cal, the fact that this is a character switching hack of some kind, and not a traditional wallhack or aimbot, makes this irrelevant.
Also, he is changing teams in the MIDDLE OF ROUNDS. So the irrelevance furthers for this CAL theory.