JVC certainly does use Carbon Nano Tube also for marketing - proudly and justly so. Butt it is NOT just a snake oil term//buzzword used in order to sell better - CNT used for the diahragm in HA-S500 is a genuine technological braktrough, one that would cost you dearly in the not so distant past. Let's simply be grateful JVC decided not to put an exhorbitant price tag on it ( they could have chosen to do so and still get away with it, given the SQ ) and - enjoy.
I do not see HA-S500 as competition for rivals priced 2-3 times their price, but far higher. Despite all teething troubles - just look at the earpad blues going on like forever on this thread - that driver is simply unheard of at the price and can hold its own practically against anything, regardless of price. Will see/hear what this driver can do in the new HA-S770s - can't wait.