re: stop following rumor sites?
That's really beside the point. Fact is, the rumor sites mainly serve as a place to announce people's best guesses and then read as others hash out those guesses in message forum replies.
If there are leaks, sure, they get posted up here and discussed. It would be crazy NOT to, on a website full of interested Apple fans and customers who are so clearly following the company's moves.
But once some product info leaks, it leaks. I could ban macrumors.com from my browser and never look at it again, and I'd still hear about the leaked info someplace else -- even if it was a few days later.
Truth is, Apple's clinging to the element of surprise is becoming a bit outdated anyway. When you had Apple almost exclusively selling to consumers and Jobs himself was pumping people up into frenzies with regular keynote speeches, it made perfect sense.
Now, you've got quite a few businesses using Apple products and the last thing they want is total surprise about what's coming next, and when. I'd venture to say that if it weren't for some of these advance product leaks and credible rumors, many wouldn't stay invested in the Apple ecosystem.
Business I.T. staff needs to have a pretty good handle on upgrade roadmaps, and a sense of when it makes the most sense to pull the trigger on upgrade purchases. (You clearly can't just rely on a set timetable with Apple, as the huge delay in a major new Mac Pro tower revision illustrates.)
You want to be surprised, stop following rumor sites.