In my day job I work in the R&D facility of one of the major motor manufacturers. One of my responsibilities is audio sound quality & we carry out subjective listening tests on prototype vehicles. All our listeners have an engineering background (as do I) & we generally get pretty consistent results despite us all liking different music genres (for the record, I like rock & 50s). None of us subscribe to the audiophoolery snake oil theories.
I was Googling some info & found a link to this website:
http://wathifi.com/ a collection of pseudoscience from audiophile mags. Worth looking at for a chuckle, it amused me for a half hour or so.
I liked the comment stating that double blind tests may be OK for pharmaceutical companies, but had no relevance for hifi....
One link also said that A/B/X tests were meaningless, because when you do them, 'all amplifiers sound the same'
Enjoy....
Mark