When the trolling got cut out, we also lost a link to a blog comparing hevc and x264, which wasn't particularly interesting in itself but had a link to this recent paper which was:
https://ece.uwaterloo.ca/~z70wang/pu...ons/vpqm13.pdf
The basic gist is that all the standard objective frame by frame analysis methodologies (psnr, ssim etc.) may systematically, and substantially, underrepresent the improvements in HEVC over its predecessor.