They said $699 reference "founder's day" cards would be available May 27.
They didn't say $599 cards wouldn't be available then. That's just my inference. But it does seem logical.
I agree. But that doesn't change that we will be able to buy a 1080 at $600. In either case - it is a paper launch today so why does it matter what comes out in May or June?
My guess is the 1080 does not destroy the 980 Ti/TITAN X so they're not showing direct performance comparisons.
No one has facts. Just guesses/inferences based on random info and marketing.