Like I'd be surprised about this sort of "news" whatsoever. I think it was pretty clear, given the incredible size of the chip, that yields were going to be horrific. I remember the original claim of a 4.6GHz core speed, with all eight SPEs. Now they're looking at 2.8GHz with 6 SPEs as the best they can do.
Personally, I had thought that Sony was going to wait until it could produce a shrink of the chip to 65nm, if not 45nm, though the latter would've delayed things into 2008 if not 2009.
I've not been impressed by the claims brought forth for the PS3. To be honest, I can't help but think that all of these chips, from the technology to the games and so on, will result in the PS3 garnering a laughable market share compared to its predecessors, and possibly even the Xbox 360 and Wii as well. At best, I can only see them selling 30 million units by the end of 2008, if that; even with the price at a whopping $600US, I forsee significant shortages throughout the console's lifespan.