If ati wants the market share enough, they'll make a q2 launch happen, which means summer at the latest. I wouldn't be surprised to see the cards in June like they are saying simply because 55nm+the extremely good yields the rv670 has+rv770 is just a suped up rv670=awesome product not too far away

Many sites have been reporting that the rv770's production is coming along amazingly, which means either we have another r600 failure or that we'll be seeing the product right on time like the rv670. I'd be willing to bet on it that the cards will be on time simply for the reasons stated all across this thread.

As for the specs, I'd say they're about right, the rv770 is supposed to be at least 50% faster than the rv670. Judging by the higher clocks, memory bandwidth and 50% more shaders (not to mention 100% more tmus), I'd say that the rv770 may be even more than 50% faster. Of course it all really matters on how well games are coded for it