I've not seen any information on this. However, CS6 already does an outstanding job of it, so...
I do NOT do commercial films, but going from AVCHD to a DVD in CS5 works well for me http://forums.adobe.com/thread/652694
I haven't done much since I installed PProCS6 so can't really say if it does a better job than CS5
It looks pretty good. That is exporting from Premiere to mpegg2-dvd.