True, but nobody is superhuman. I'm not saying you don't have better hearing for details than most, Jauqo. But all of us have senses, and they can all be tricked. Optical illusions are a great example. So are the sensations amputees often have where they feel like they still have the amputated limb attached, even though it's clearly evident that the limb is gone. It's not a new idea, and nobody is immune to it.
As for the speck of dust on the pizeo pickup, a spectrograph of the waveform would have shown that you actually did hear it that way. Where's the spectrographs proving what these cables do? If these cables did what they claim, I don't know of a single reputable manufacturer who wouldn't endorse their usage with their amps. So where's his list of endorsing manufacturers? All he's got are musicians and studio owners, and sorry, I need engineers to get behind it to believe it because I know how easily the ears can be tricked.
But if you truly believe your ears can't be tricked, do a blind test. You have nothing to lose.