I mentioned this over at RDNA, but I ran some speed tests last night using unfinished scenes I'd created last year. Depending on the scene, I was getting about a third better performance in the rendering (64 bit Win 7, PP2010 and 2012), but what was interesting was one scene that took longer to render in PP2012. When you look at it, however, even with the same number of IDL samples it came out significantly better than the same scene rendered in PP2010. When I cut the number of IDL samples in half and re-rendered in PP2012, the two PP2012 renders were pretty much indistinguishable but I was back to a render that only took 2/3rds the time as in PP2010.