no, from what I saw he didn't
Now honestly, if he's hacking, he's a very bad hacker and they're really only bringing him up to a normal standard of play. The way I saw it he was pretty even with the guy the entire time, so honestly who cares? he'll be VAC Banned pretty soon anyway if he was.
Also I didn't know you could get aimbots (or triggerbots) for projectile weapons, would that even be practical seeing as you have to lead your target?
But of course I'm not expert, I've never seen a guy hacking to compare it with so I can't say either way.
Anyways, they're having a second competition, even if it does get buried under all the halo vs non-halo posts on the Steam Forums.