The fact that they can't be satisfied with merely posting their own listening experiences ( which they have yet to do here, btw) says quite a bit. A very wise engineer once said, "If you haven't listened yourself, you don't HAVE an opinion." The best and most civil advice is to listen for yourself.
Vhiner
I try not to get involved in these discussions anymore as they are truly a waste of time, but here's my two cents.
Been posting here for ten years or so and as the OP I am also a DIY guy of sorts. My experience tells me that expensive cables make no discernible difference over a well built DIY power cable which I have built. And when I say DIY concerning power cables I mean proper gauge cable with a good connector and solid connections. In my system I do use some after market power cables but still don't feel they make any difference. Why do I keep them? They're there and I have no interest in them any longer.
What it really boiled down to for me was I got tired of, and honestly felt kind of silly, listening to power cables instead of music. Thin skinned audiophiles may take offense to this but I mean no offense.
I absolutely agree with the last sentence of Vhiner's quote. If you are so inclined, go for it. I tried it, heard no difference and have moved on.