Apple stock help drive mutual fund returns

I'm not Wall Street wunderkind but it doesn't take Warren Buffet to know that Apple's stock has been performing well. It would seem that, at least according to the New York Times, Apple's performance coupled with Google and RIM has lead to many mutual funds seeing extraordinary growth this year. Many funds are glad they didn't sell all their Apple stock when it seems that it just couldn't go any higher (how high can it go? I have no idea, but since I don't own any Apple stock it really matters little to me).