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So please.
If you are going to make positive claims regarding your experiences and the behavior/performance of a piece of wire, then provide objective, falsifiable, repeatable evidences meeting at least minimal experimental controls to back those claims up. If you do not have that - make damn sure it is clear you are talking about your opinion, and do not try to wrap your experiences in language or tone meant to given undeserved credence to what is nothing more than your base opinion.
Please come to my house with a decibelmeter, pre-prepared tabular questionnaires and and incentive and the data will be all yours
Seriously though you can't expect everything in the world to be provided with objectively verified data.
Interesting story, but did you know that Joe Grado tunes all of his headphones by ear? Another interesting story, none of his headphones come with objective data to verify their performance. Further to this, if one were to look at the objective evidence which has subsequently been provided (eg headroom measurements) one would never buy a pair of Grado's.)
Now Tyll Hersten has been kind enough to spend time and money creating objective headphone data, but if this data was not there, would you expect every headphone review to be accompanied with objective data? That would not seem reasonable as most people do not have the equipment, nor the incentive to provide this.
Cables may have the special status of being outside of what is considered legitimate and objectively verifiable audio products, however given the means available there are numerous other products which might just as easily fall into this category such as certain electronics design topologies, dampening factor, burn in etc etc.
Common sense would dictate that a lot of these designs should provide no audible benefit. We could go into component selection etc. etc.
IMO the application of common sense, cogent and positive reasoning has its place in minimising cost and waste (engineers ahoy), however if a design choice leads to better performance, regardless if this aspect of performance is considered to produce objectively negligable results, that a designer should explore these options in case there is a global optimum outside the immediately obvious local optimum states.
For clarification, I certainly am not claiming that all these factors are comparable in the magnitude of their efficacy (although I suspect some of them are), but if we stuck to what is considered within reasonable limits we would be left with a world of mediocre and sub-optimal products, with no progress made at all.
You may feel free to claim that there is some universal responsibility of the world to only provide products which provide objectively verifiable, blind testable performance performance, however I do not think it is reasonable to expect this from a capitalist economy, and personally I am glad that this is not the case.
Rant complete
EDIT: too many winks