The one who's winning games for Houston is T-Mac. The guy is unbelievable. He can score from anywhere as well as drive the lane, pass and rebound.
If Yao really was a decent top-ten player, they should be competing for the top seed in the West.
Houston has some other players as well in Barry, Wesley, Howard and Sura.
Yao scores, but he doesn't average 10 rebounds a game. He also doesn't move quickly enough on defense. He's not in great shape, or rather he's not very athletic or coordinated.
With all of that, when it's all said and done, the Rockets are a better team than the Lakers this year.