That slide could be very real and the release date also could be real because if they release the GTX 580 before the 6950/6970 come out they have no real single core nemesis. Reviews would write it off as the most powerful single core GPU and in the end of the article mention that cayman is coming and that's it.

If its not a paper launch i would imagine it being a super limited launch which would make the card seem hot since it is sold out.