you underestimate the gullibility and overestimate the analytic quality of human’s in general.
Some like usual see anything save in the black and white color qualifications they project onto the world...
To hear a difference sometimes ask for specific conditions about the gear noise floor and the room acoustical settings...Is it not simple to understand?
Dont throw the S.G. but look at improving the mechanical and electrical and acoustical working dimensions of your system and room first... S.G. CANNOT be the first thing to use for improving your system....I said it many times...
Hundreds of people all across the world and through a few decades vouch for an audible positive impact on their audio experience with S.G. some vouch they hear nothing...
The best explanation about this discrepencies in perception is what i just said, difference in gear, difference in embeddings controls, the best explanation cannot be a stupid and hysterical accusation of hallucination or of collective placebos effect first and last against a very great number of peoples...
Placebo effect exist, but working embeddings dimensions controls and their noise floor exist also and are more important factors in audio experience than the placebo concept some hysterical doctor see everywhere, even if it is not the MAIN factor at all playing in the audio field...
«For an idiot using all the times a hammer all is nails, and sometimes even for a wise man if the hammer is near his hands all he see is nails»-Anonymus Smith
«My hammer was the only nail i had»-Groucho Marx