The story at videocardz is a bit off. Volume 20nm production starts in FEB at TSMC and another fab coming online for the same volume production in may.
So if you're pumping out volumes of maxwell in feb, you should be able to get cards out in march or so I guess. I really can't see anyone making another 28nm launch if it's after xmas. You are not going to make things go faster without pushing us up above 400w etc on a single card...LOL. You need a die shrink or any other launches are wasted and will gain next to nothing. I call any "NEXT GEN" that doesn't get 50% pointless. Next gen is supposed to be maxwell. You can't have anything but a re-spin on 28nm at this point. This has to be 20nm and if not they need to delay a few months to make sure it IS 20nm. I'd rather have 20nm in june if it's 28nm in march.
Edit: Maybe they'll release low end stuff on 28 and the higher end on 20 a few months later. It would be easier to figure this all out if we knew exactly how much TSMC production would be 20nm in Q1. But they don't offer that
Also, if hawaii is any good, I guess they'd be forced to answer at 28nm like it or not. You can't just sit and let your enemy take market share.