I did notice the 30% increase in 3dsmax.
Anyway, Hyperthreading is Intel's marketing name. SMT, multithreading on a single chip, is an open design and can be implemented at any time by AMD if they wish. They aren't planning on it soon, but if multithreading catches on, they're going in that direction, said so themselves. And as I recall, the Alpha design team originally put SMT on the EV7 (maybe it was EV8?) design.