Judging purely from current gameplay he's not very good compared to current top ELO players. Number 1 back then is different from number 1 right now - hell, a few months ago, HotshotGG was playing a hell of a lot worse than he is now and now there's competition (Pobelter, Reginald, Chaox, Bigfatjiji in US; MoMal, Shushei, CandyPanda, Wickd in EU)
Just saying that he's out of practice and champ spotlights usually show very one-sided games.
@Synre: http://www.mobafire.com/league-of-legends/forum/general/list-of-wukong-bugs-6873
He even admitted that he's not at the top of his game, but only because he hasn't had the time to commit to playing all day like he used to, since he now works at Riot. The player he was back then is completely different than the player you see in those spotlights.