Like to think he's legit, but I don't feel a good anarki is that fair a match up for a VQ3 characters so not too worried as I think they'll tone him down in some way, even if its reduced speed at the addition of more base health.
I heard he was 2300 elo in quakelive which must count for something. Considering that plus the fact that he competed in cs I see no reason to assume he hax.