I gave up arguing about snake-oil speaker cable years ago. Many people have told me they can hear the difference between "ordinary" O2-free cable and the same with the strands woven in various patterns.
There's a different version of Ohm's law for Hi-Fi junkies, I fear. They also think a few millihenries of inductance or a few pF of capacitance will make an audible difference at 15kHz - and can hear it.
I use 230 volt lighting flex to connect my B&W speakers to the Quad 33/303 and don't plan on changing anything.