I've spent a bit of time on track on the new R6 and it definitely is fast. I haven't learned how to ride the thing properly but first impressions are that it's very light and flickable, brakes well!, but if you're not above 12kRPM absolutely nothing is going to happen.
Still, a few people I know who've ridden them more than me and back to back with this years R1 (
) say that the R6 is still the quicker bike around the track. And these boys are fairly quick and know what they're on about.