Taras, good comments; you are dead on target with your observations. Yes, there are times when even with single cable comparisons or power cord comparisons I have thought the same; a person who cannot hear the difference must have hearing deficiency. The only person to hear cable changes in my room and conclude not much had changed did in fact have hearing loss due to being a musician in a rock band. Others, including several hard boiled skeptics, admitted that they did hear the differences. What's interesting is that over time they have publicly defaulted back to their public persona of minimizing cables. Is that two-faced? Yes, of course, but I understand how they have a lot invested in their businesses and want to run things status quo versus upset the apple cart. If they built the business on "measurements", then it's a tough customer sell to upset that.
I have tried to be conservative in describing the effects of the Schroeder Method, so as to not be discounted as not reputable. Persons that know me and my writing are aware that I have a high threshold for what is considered efficacious in system building. The Schroeder Method easily clears that threshold. It is gratifying to see that a growing number of other audiophiles with various systems and cables are finding the same result. That adds to the tentative conclusion that the benefit is universal (When applied properly and to the proper systems).
For decades audiophiles have thought that they had terrific IC connections. Not even close, it seems. It's astounding how much loss was happening between components. It appears no one had a clue how much.
Yes, the innate characteristics of the cables used would dictate the result. It's a simple, powerful formula for vast improvement of an audio system. Even the most extreme systems will benefit.