The most important x264 changes took place late last year and early this year. While you would expect they would optimize for the new i7 platform, they also did this for the new Phenom II. And the results speak for themselves. It's the first time AMD can keep up at the same pace as any Core 2 Duo/Quad and now even with i7 not running in HT and/or Turbo mode. So software optimization does matter, but there are no other programs we are aware of they do optimizing for AMD, as you can see with CineBench R10. Of course Intel E7200 and E8400 are not triple-core, but to keep charts simpler, we did it this way. To make the comparability more fair, we decided that the Intel i7 series have to run with only their native cores and Turbo disabled.