Doubt it - I can't see AMD running this on the edge of clock capabilities, just their cooling capabilities. Keep this cooler and I suspect it will clock a lot higher (depending on power draw and temps, of course).
I know people are worried about the temperature of the chip, but actually the *heat* shouldn't be too bad. I think a lot of people are missing the fact that the die area is relatively small for such a powerful chip, so there's an issue of heat density making the silicon reach a higher temperature. It can't kick out that much more heat than any other high end card, as it doesn't draw that much more power than any other high end card.
That said, I'm a bit disappointed that AMD have pulled driver and frequency related shenanigans to boost the card's performance prior to release. I'd love to see a full set of performance figures with the beta 5 drivers to see what level AMD originally intended this card to perform at before nvidia cut their prices...