Seems like this could be easily countered with performance and availability. Surely they could launch with the inevitable GDDR4 model and follow up with more affordable GDDR3 ones without having to delay the press fest?
Assuming I'm correct, it still smacks of two things. One would be "Ready. Fire. Aim." somewhere in marketing, and the second would be likely that R600 is not going to be put a R300 vs NV30 smackdown on G80. I think most of us expected that went by the board in November anyway, with the possible exception of a high-bw niche here and there.
I don't know that they've ever quite had a situation like this to analyze tho either. Their flagship product is launching with two different memory types, and the asymmetry of bus-widths between them and their competitor doesn't just have bw and cost-per-mb implications (for GDDR4 vs GDDR3), it requires an asymmetric framebuffer size as well which also goes to cost. Then you have to analyse/decide what price and performance implications there are for 1GB GDDR4 vs 768MB GDDR3; 768MB GDDR3 vs 512MB GDDR3; 512MB vs 368MB (presumably NV could pull out a 368MB GTX, but would that framebuffer be an owie for a high-end card?); 512MB vs 320MB.
But, you know what, it was still somebody's job to analyse all that and to have done so before they scheduled an editor's day and launch date(s). So there's still no way around the simple fact that this wound (the pummelling they've been taking here and elsewhere for setting a date and then backing away) is self-inflicted, in my book.