This topic is covered on a good many other threads. However, in answer to your query, I suppose the first thing to note is the name of the forum; it's called Mac Rumors, not Mac Facts. Having said that, some of the "rumours" do, indeed, appear to be quite well-sourced. As recently as last week, the received wisdom was that any change to the MBP would take the form of tweaking at most. Minor speed bumps. That sort of thing. Over the past two days, the mood has changed and informed opinion seems to be suggesting something considerably more extensive may be on the cards.
Shdowman makes a good point - one I agree with and have said in other posts - that if you wait to buy to current machine, you'll probably be able to avail of quite a generous discount. If you buy now, you'll still get a great machine, aesthetically attractive, great performance, powerful and equipped with a superb screen. If you wait, and buy the new machines, obviously, they will be outstanding; they may have some glitches, which may ned to be ironed out. It is your choice. I'm a recent switcher and I'm very happy with my MBP. Good luck and cheers.

MBP 15.4", 2.4 ghz, 2 GB RAM, 160 HDD; iPod classic 30 GB