Just a few extra cents from me: I find that most if not all myths come from intuitive conceptions. "No component is perfect thus all components must degrade the sound", "thicker cables, fewer losses", and the very convinving "it stands to reason, doesn't it!" (difficult to argue with that one). And, not to be unkind but certainly not least, the promotional blab written by .... well, certainly not a technical guy.
Maketh product, must maketh money, must laudeth product .... and I am sad to say (but no alternative left to anybody with the least savvy of how electricity works): Simple blatant profit making by misleading claims with little/no regard for scientific truth.
Perhaps not to post this - but there, I have pressed the 'post' key ....
PS: I am certainly not dissing the beautiful products pictured above - but they were all chosen for the right reasons; not to achieve some magical über-audio potion.