I believe that is referring to the new BE models, and not so much the Phenoms.
But if that is talking about Phenoms, really I don't think you would gain a whole lot. If the hypertransport is crippled, that's really the largest gain you would see there.
I have also read other places that you just need to do a BIOS update, and then it will be supported. But when I looked at the docs for the BIOS update, it only mentioned added support for BE models, not Phenoms. So really, I don't know.. lol
It's quite confusing...