"..obviously the listening tests were done by folks who weren’t hearing impaired."
It is not obvious at all. We are still waiting to find out who those people were and how they did it. For the initial simplicity, we can assume they were not hearing impaired although the solidity of that assumption is not that great.
"And the results correlated with wire direction. I.e., they weren’t random."
What results? Whose results? When and where results?
"There is no operator error when 80,000 hear it."
Which 80 000? Where did that number come from and how was the study conducted on such a large number?
Even if all 80 000 exist, your favorite reference might suggest the possibility for a multiple-operator error.