Jim,
I read all articles, but couldn't find scientific proof and properly presented magnitudes. The values and graphs are NOT real and I pointed that out prior. It's faked and it's visible even by high school pupil.
Lots of theory why..... scientific proof?
...because I don't like to be fooled by no one including even Allmighty! Lots of theory is never an argument till some of it or all is proven not just by reviewer or bunch of positive review articles or earlier mentioned Him.
Even if something is already scientifically proven still requires a research towards desired results vs. investments:
I found some proof about wire properties affecting sonics, but also found no point to spend thousands of $ per wires. By default to me they're all overovermarkettedoveroverratedoverovervalued and don't make sense therefore. One can achieve same results or better by properly researching electric properties of pro-audio wires to synergise with your system. They're priced and valued far closer to reality per performance. Why pro-audio wires, because there are more truth in description vs. home hi-fi wires. No point hiding anything or boosting parameters.
I had HHScott amp with vintage telefunken tubes and liked that one a lot, but had to sell it due to the very curious toddlers in my dwelling. I also like vintage transistors and capacitors. When I get chance to research circuit improvements and find vintage goodies I go mod my units, but most of the time I'm very busy with my vinyl/cd shop.
For powerline safety and performance I also shop at pro-audio. It's manufactured by major brands that have great support for pruduct such as Furman.
As for powercords, stock one usually has best value for performance no matter how good is aftermarket one.
I like good recepticles and good connectors and use hospital grade Marnico.
Regardless weather reviewers are biased or not, I believe that most of them hear what others sayin' or listen to what manufacturers are saying, then believe, then write something what they believe.