Just read this; not sure its been linked yet. Only one thingsprings to mind; uh oh......snip.....
If potential buyers get a wide range of benchmarks and correct specs, the conclusion will likely be GTX480 = HD5870 in performance.
....snip.....
The end result is that the GTX480 is simply not enough for a resounding win in anything but the most contrived benchmark scenarios. It is well within range of a mildly upclocked HD5870, something ATI can do pretty much on a whim. The GTX480 can barely beat the second fastest ATI card, and doesn't have a chance at the top.
I'd still have one though!