Okay... I spent some time on the website for the insane super costly power cable company that dude was making insane claims about. It turns out that they aggressively promote their power conditioner products (look to be over-engineered basic LCR filters, similar to TrippLite Isobar, but with audiophile parts) with their cables. So, suggesting that once the AC is well cleaned and more "pure" a good cable could make a difference is, at least in my book, plausible.
I still don't think a 10 foot power cable that costs more than $75 is ever justifiable, but at least they are isolating the power from the hundreds of feet of in-wall Romex and the power company's lines. I give them credit for that one little thing. So, the idiocy is slightly lessoned.