Once again, if you don't think there could be improvements, then don't buy them. Lots of folks hear no differences between amplifiers either.
FWIW, I've heard differences between some cables on good systems, both subjectively and switched by someone without my knowing, but most mass-market cables (ratshack, monster) make no improvement to my ears.
Never auditioned these though, but I've read reviews on the audio forums. Like you, I've never heard differences in cable direction either. And as for the "science" behind this brand, sounds like a sales pitch. The company did offer a 60-day money back guarantee, but I don't know if that applies here.