Without self experience, you have to rely on others' experiences but you aren't just questioning the why but the logic of the choices made.
Specifically, BlueFox made a decision to try out something and found it was better. Instead of asking "How do your experiences differ from that of the previous $XXX power cord to the experiences with the new $XXXX power cord?"
You state that *you* find it hard to believe his choice to go with a more expensive power cable could make that much of a difference.
I am not defending anyone but I will defer to those with actual experience.
Let's take my own experiences as an example.
I love the look of Nordost's flat speaker cables. So much so that I *almost* bought them without listening to them first (Specifically the Freya model).
But I had no previous experience with these cables. So I looked at posts on forums all over the internet and then made arrangements to take my speakers to a local shop that carried these cables and actually experience them for myself.
I didn't go onto the forums and tell people that they were wrong or that they couldn't hear that much of a difference because I didn't have those experiences for myself.
I did ask some questions like, "How full is the top end with those cables?" or "Is the bass/mid-bass muddled at all with them?"
When I finally did get my ears on a pair of the cables, I could then make the choice based on my own experiences instead of relying on or dismissing the experiences of others.
(Incidentally, I thought they sucked...especially for a $1700 pair of cables)
You said it yourself, the music and how it sounds to *you* is all that matters.
If BlueFox or DaqueKnight or Jhayman or anyone else for that matter says that something they actually tried/did makes a difference in how their system sounds to them, then I am not going to begrudge them spending $XXXX on a power cable versus my DIY power cables.
Yes, you have a very valid argument with other possible items making a bigger difference in the power supply chain.
But you also assume that these folks haven't already made those changes.
But all they were doing were sharing their experiences within the topic of the thread.
Now if the thread had been questions about the whole circuit from "pole" to internal transformer then it would make sense to discuss those things.
But the question that was asked dealt with a very specific link in that chain...not the whole chain itself.