Shaq doesn't clog the lane offensively. Yes, he is in the lane, but he doesn't clog it. All of his career, he has played in the lane with some great attacking guards or SF, whether it be Penny, Kobe, Nash, or now LeBron.
He pushes to his spot on the lane, the attacking player pushes the key and if the C rotates off of Shaq, Shaq gets the ball for a easy dunk. If he doesn't rotate, the attacking player normally gets a good look at a lay up.
It isn't revolutionary, he has done that nearly all of his career. I've never heard anyone say how hard Chaq made it for Kobe or Penny to drive the basket.