NVIDIA's benchmarking stressed the GTX 480's superior tesselation performance over the HD 5870, but it was level pegging between the two cards during the more conventional moments.
As ever, wait for the real benchmarks (i.e. games) before deciding who wins, but we're slightly disappointed that NVIDIA's latest and greatest didn't just blow ATI's six-month old right out of the water.
Engadget : http://www.engadget.com/2010/03/06/nvidia-gtx-480-makes-benchmarking-debut-matches-ati-hd-5870-per/
Nvidia video @ Youtube : http://www.youtube.com/watch?v=vpdPSZB8A8E