Ahhh... the endless debate about wiring.
First, I think the article is only accurate when it talks about wire resistance... and even he claims it can make a difference in sound.
What he does not talk about is a real world application. What does it look like behind your entertainment center? Is it nice perfectly laid out cables? Power cables separated from speaker wires and interconnects? No loops or lines crossing over each other? Most of mine is all wadded together in a semi-coherant rats nest... from what I understand there can be a lot of radio and electromagnetic frequency disturbances... which can effect the signal running through cables. Some wire manufactures claim to address this, whether they do or not is another story... but that does not mean that fancy speaker wires a waste.
The "listening tests" in that article are what kill me. Hooking up a couple of different types of wire and using a swtich box to jump between them to see if you can hear a difference is hardly a critical listening test. Anyone who sits and truely LISTENS to their music and become intimately familiar with nuances will be qualified for this sort of test. Any differences heard will be minor, it could be a tad bit more clarity in some background instrument, maybe a lower noise floor, or a little less harshness in a symbol. For an audiophile, those minor differences are very exciting and can change the song entirely. The average joe-blow would not be able to tell a difference.... an audiophile may not be able to hear a difference if they are not familiar with the song... but they are differences none the less. Does that make a $20 per foot speaker wire worth it? Depends on how much you like your music.
So, the article picks on Monster... which may be throwing fuel onto the "all wires are the same" crowd. I don't consider Monster to be audiophile grade, just really expensive, but "ok", wiring. Their in-store demonstrations, as described in the article, do not help matters any.
There is mention of a challenge of sorts in the article. Cash moeny for anyone to be able to get through a blind cable test. They make it sound like an audio expert should be able to sit down in a "controlled" test and pick out which cables are which. I don't know what the mean by controlled... but if it means the listener gets to pick the equipment, music, and get a month of listening with a "base" set of speaker wires... I'll bet I can pick which cables are better than others with only an hour of listening on each cable brand (without knowing the brands of course). In the end better may not be the most expensive, but the point is hearing the difference.
Whew... that is my 2 cents.