I think a mountain out of a molehill is being made from the enthusiast quarters, although that's pretty much expected from hardware nerds.
And AMD fans will conveniently forget the Phenom I TLB bug. We should all be happy Intel actually came out with this so quickly, as opposed to a certain automaker who decided to sit on their problems hoping nobody would find out until they got outed a year ago.
Really, from what I've read, the degradation ranges from 5% for casual users, to 15% for those who heavily use the bus. I doubt many heavy users would be running a mid-range SB system. Plus, it only applies to SATA2 ports, so just plug the OS drive into a SATA3 port, select the drive in the BIOS' boot manager, and problem solved.
Still, enthusiasts will be RMA'ing their motherboards en-masse for something that is pretty minor. There's going to be quite a few funny stories of angry people waiting weeks for their boards.
It is a shame BD got held back, but then Bobcat and Llano are looking to be incredibly promising products. I'd rather AMD pursue the mainstream with those products instead of trying to get BD out just to appease the enthusiasts, half of which don't even buy the products they're rooting for.