If you want my professional opinion (and I'll assume you did because you came here to read it), that's all bunk. I waited months and months while Macrumors' page said "don't buy - updates soon" on the iPod, hoping against hope that I would be able to get an iPod with a touchscreen, and it was just days after I finally broke down and bought a Video iPod that Apple announced the iPhone. I have no doubts that there will be a portable update soon over at Apple (in fact, I know that someone over at our sister site Engadget is waiting until January to buy an iPhone just in case there's a new revision announced soon), but I would say that before the end of November is a little too soon.
Still, if you're planning to buy a new MacBook or Pro and can stand to wait a few weeks, you just might want to. As usual, we guarantee nothing, and personally I doubt it'll happen, but if Switch's reasoning seems sound to you, give it a week or two and just maybe you won't be left out in the cold if Apple launches new MacBooks in early winter.
Update: Figures. I have to wait months for a new iPod, but when I post my doubts about using the same system to predict a MacBook update, I'm way wrong. And the Pros got updated, too. Good times.