Yes, double blind test can be poorly designed, implemented and the results can be misconstrued. At the same time human senses can be easily confused, mislead and outright wrong. The problem for audiophiles is that we hold as an article of faith that we can tell very subtle differences between equipment using our flawed senses.
As a famous audiophile once said, "a man's got to know his limitations".
As a famous audiophile once said, "a man's got to know his limitations".