"How do superconductors work?"
Well, as you cool the conductor down, it shrinks. The inter-atomic spacing decreases. Superconductivity is acheived when the interatomic spacing becomes smaller than the mean free path of the free electron gas inside the conductor. So they can travel between two atoms with no resistance.
There is more too it than that as I understand that the electrons also start behaving differently, something about pairing but I didn't study superconductivity at uni.
"I am a bit biased as I use Townshend Isolda cable. While I can't say if the DCT has improved it, I can testify (blind test as well) to the sonic superiority over every cables me and my friends have."
well, makes me wonder why things like this aren't treated before purchase. I mean amplifiers and such it might be difficult for, but interconnects.. just dunk by the cartload, surely. That's gotta bring the price down.