I feel the need to post my 2c on this topic.
Being "open-minded" means taking the attitude that things should be judged on their merits - do not dismiss blindly, without knowledge. This is obviously a good attitude in general, based on rationality. Rationality is the key here: and rationality also mandates taking opinions on things we know, from our knowledge and experience, to be nonsensical.
Believing that such a "tweak" as the one under discussion works, with not only total lack of evidence, but a great deal of contrary evidence from science and experience that should tell us that it cannot possibly work, is irrational. To even entertain the idea to me suggests a great deal of sheer ignorance in a variety of topics, and I must believe that the gent behind MD is either seriously deluded or essentially a crook, and more likely the latter.
It is seriously disappointing to me to see prominent people in the industry defending this voodoo garbage on any level. Subjectivity in general is wonderful - nobody knows to any detail how the ear/brain mechanism really works and anybody savvy knows that our machines are not measuring musicality to any real extent. We just don't understand things well enough. But this stuff - this has nothing to do with subjective evaluation of hardware - it's just stinky horse crap and is not going to provide any more audio benefit than horse crap - which actually could help quite a bit if your room was bright and you spread it on the walls.
Ciao.