I'll believe this when it's released, though i'm def getting the feeling its going to have a weaker core config than the GTX 580, perhaps 2 570 chips, which would be kewl bc it'd show us what the 570's hardware specs. I feel that the 570 is gonna be a hella great deal, kinda like the 5850 was.
As for Nvidia taking back the single and dual gpu crown. I highly doubt it. Im not gonna be surprised if AMD purposelly helped the leaked rumors saying their 6970 has 1500 some shaders. sorta given em the benefit of the doubt or at least that they learned from Nvidia's mistake of dilly dallying.
Watch it release with 1920 shaders or something, 900mhz core clock. that'd be tight, n of course ROP's n whatnot would get n increase. its been said that the 6970/50 chip are a lil off coure from AMD's usual small but extremely efficient per mm2, So yea with the bumps in specs they spoke of, this chip would be smaller than 580