Yup, I've experienced my sighted impressions "dissolving away." It's both a humbling and amazing experience. I've done it both with cables and testing a burned in amp against an identical model that hadn't been burned in. I can't express how obvious the difference in sound quality seemed to me during the sighted listening, so having the effect completely vanish just because I couldn't see which device I was listening to was like experiencing magic. In the end it taught me how malleable my perception of sound quality is to both conscious and unconscious expectations. My ear transduces the sound and then my brain interprets the resulting signal in the light of other sensory information.
I don't know why, in this day, it is still so controversial @asctim . It should be obvious to everyone that we use multiple senses all the time. For food, both taste and smell, but we are also influences by site. The visual input you are receiving of your environment influences what you think you are hearing. If there are two sets of speakers in front of you, and one is very large, and one is small, you will assume that a deep bass note is from the large speaker. It could be from either or a sub you don't even see. We intentionally have control groups and placebos in medical research because humans are so influenced by their present environment and condition that it is the only way to collect accurate data. Audio is not any different.