If you see the jump Intel made by switching to HT you wouldn't think it to be a bold claim. Look at the first gen i7 compared to it's predecessor. So, AMD added SMT, 3D transistors, improved caching, etc. But yeah, more details would be much appreciated. I can't wait to see a diagram breaking down the architecture layout.
I'm not surprised of the jump, I've been waiting for AMD to make such a jump so they could try to keep up with Intel's horsepower.