It's not just the TV guys like Johnny Miller. Before he had even finished his round on Friday, some idiot in this thread said that McIlroy could win 10 majors.
OK, that idiot was me. He's at 1 and counting. Ogilvy, Immelman, and a bunch of other guys that have broken through to win a major didn't do it when they were 22 years old, and didn't set all kinds of records when they did it. McIlroy looks like the next superstar in golf to me. I think he'll have a career better than Phil, Ernie Els, or Greg Norman - something along the lines of Gary Player or Arnold Palmer. Not equal to Jack or Tiger, but among the next tier of all-time greats.
Time will tell. Don't worry - if he wins several more majors over the next decade, I'll be bumping this thread eventually.