No, it's just that 9-11 (no pun intended) month delay is beyond my wildest dreams.
But then, truth is stranger than fiction.
[All of the following assumes that Bx spin will be needed, which will materialize in June/July time frame. This assumption may or may not turn out to be true.]
That is probably enough time for AMD to start pulling their next gen stuff out. In all probability, not all of it. I am pretty sure it will have to go up right against whatever AMD has in store for the back-to-school season. As for midrange, my guess is that they'll receive a post launch silicon-respin as well.
If GT200/GF100 are any indication, building giant sized GPUs has hit not just power and heat wall, but also an engineering wall. These things need too much time to just get out the door, not to mention their kids. I shudder to imagine what will happen if GTX580 suffers from similar delays.