As has been mentioned before, in his day McHale had the most unstoppable moves in the NBA, and he tutored Big Al for years, which definitely shows in Al's game. When McHale got the ball in the post, he was very patient. If he didn't have an immediate shot, he went to work, taking his time. He would execute several moves without ever takin a shot, just ball fakes. After a little of that, his defender was so off balance/out of position that he could virtually score at will.
Although his teammates (like Ainge) called him "the black hole" (because the ball never came back out once McHale got his mitts on it), McHale was wildly successful. Once he got the ball down low, he had one thing in mind: to score, even if it took some time. He was very methodical.
This is what he taught Al to do, over and over and over. Big Al has been habituated to that mentality, and I think it's a big reason he might have more trouble adjusting to the Jazz's style than the average bear.