hahahaah, yeah. I don't even need to read the article to know what it says.
As with all 'hobbies' the benefit is in the eye (or ear) of the beholder.
It's like modifying cars. Dyno's can be made say anything by the operator and 2 cars with the same peak number will still drive differently but both owners will swear black and blue that theirs is better.
My approach with audio gear is limited by real back to back differences I can hear between my gear and other systems that I place my components into to hear their deficiencies. If I can spend <10% of purchase price on upgrading a few (now very old) internal electrical components that are due for replacement regardless (due to age and heat) then why not give it a go. Damn side cheaper than replacing the amp/speakers/other!!!
I have a mate that just brought a $US1500 power cable.

That's pushing things a bit far in my book........ but to him it's changing the sound (whether it's good or bad in his mind is his choice). I'm yet to hear the changed setup with this new cord in place but I'll be amazed if anything's changed. Then again, I've been surprised before on changes as simple as interconects or speaker cable.
A healthy dose of scepticism is always helpful though. I keep bringing things back to basic physics and chemistry though. If it doesn't make sense for an AC transmission line setup (music is basically AC voltage & current), then chances are it's dubious.