He certainly is an ace pilot - unfortunately he isn't on wipEoutzone anymore, as he was banned for several offenses of general douchebaggery But yeah, he dominates on the leaderboards, no clue how he does it. Probably lots of spare time.

And the so-called 'boost start' you guys are referring to - that's just a synchronisation problem with online play. The game doesn't synch up correctly sometimes, so some players accidentally start a couple of (split)seconds ahead of everyone else. Then, when the race starts on your screen, the position of the early-starter is corrected to where he actually is (a few seconds ahead) - so it looks like he is speeding off.
In the end, the only thing that matters is the total racetime, though, so at the finish line the true position in the race becomes clear.