First, Lars Fredell did the exact same thing with his W/P, what 10 or more years ago, before he got his Verity Parsifals. Nothing really new there.
As far as Part B goes, I'm not a fan of WBT connectors - esp. those EU certified ones. Try putting a big spade into them. Good luck! I had compared years ago the Clearaudio RCAs with the WBT RCAs on identical pairs of Discovery ics. It wasn't a contest. The Clearaudio's won hands down.
Now as far as the cabling goes, he's the first I know that thinks the Siltech is soft or the Transparent is hard. I swapped at the time I had the W/P, the Transparent Puppy tails for the then standard MIT (now this is ten or so years ago). The Transparent took away much of the W/P's hardness and made them sound far more musical and easy on the ears. I also didn't know Dave had changed over to Transparent for the speaker's internal wiring.
I think this guy needs to look upstream of his speakers for problems, not with the Transparent cabling.
I guess you guys missed the point. The question is did you hear a difference. As the author points out- clearly a matter of taste. I detected a bright slightly p a sound to a darker smooth sound. proving that cables do make a difference. What about that cheap batting Wilson used. if nothing else Wilson should use the best of the best.