The science of opinion ...

Ethan is in the business of selling a product --- acoustic panels. So of course he will say this and that is snake oil, simply buy my acoustic panels. It's his marketing strategy. As simple as that. Everyone in the business has an agenda. Yes, he says he sold the business, but his name, face, etc. is still in the website, and am pretty sure he is still getting paid from that business in one shape or form or another.

Are you sure you’re not Ethan Winer? I bet you are. It would be just like him to come in as someone else and say what a great guy Ethan Winer is. Give me a break.

Oh... Ethan does this all the time. Especially on Facebook. He has several fake (very fake) accounts that he posts under. It is easy to tell, as often he forgets under which account he is posting, and posts something that the "real" Ethan has already posted before (he is getting old)

All the anti-audiophile master debater pseudo-skeptics come from the same factory. 

Just curious, did one of those fake accounts contain the name David?

I don't remember David. Names of the fake accounts, are typically one of those with first and last names both sounding like first names.