Since GPUs fabricated on TSMC's new 20nm process won't be in full production until the second half of the year, whatever they're bringing out now will be fabricated on the same 28nm process as everything since the GeForce GTX680.
It was interesting to read about this as I thought "volume production" was full production, but apparently I'm wrong. Safe bet that they won't make a third flagship part on 28nm again though.
I was really looking forward to an earlier launch too. More time to earn EVGA bucks I guess