Hakeem wasn't even the only Rocket to do that and from what I recall, Ralph Sampson made it a habit of being blocked by defenders.
You know, anybody can dunk. I think Yao has a huge advantage over other 7'+ players because he actually had to learn how to play the game, ie. footwork, shooting,..... Many players today don't take the time to learn such skills and depend on "going to the hole" instead. Yao is going to be a great player, just wait. He has the right attitude and the skills to follow. He will learn very quickly. He has a whole country that he has to represent.