Winning a tournament of that level (and doing it convincingly) is no fluke. He has some sort of game sense or timing sense or something-that-I-can't-label that makes him make the right decision everytime. He has said several times that he doesn't practice as much and would rather have fun (heck, he even left oGs), calls his micro poor and that watching the other Zerg replays he can't really point out what's the difference between them.
I honestly don't know how he does the stuff he does. I also have no clue how to practice or get that quintessencial skill that he has shown.