I saw this and my BS meter pegged and is now broken. When I noticed the price each of $147.72, I almost fell over. Anyone here ever installed one of these?

WattGate 381 Audio Grade Receptacle

I did a search here and found another post from 2003 on the subject, so apparently these have been around for quite a while now.
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?