Tried, but the link for the WattGate in the old post says, "File not found".
I did find a "review" by a supposed audiophile that says it provides "synergy" to their system... whatever that implies with regard to this application.

That's why I asked if there "Has there been any further testing done in the last six years to verify the credibility or advantage in using these receptacles for audio applications?"
I haven't found anything yet though and it sounds like I probably won't.