I've avoided answering it, and will continue not to answer it, because it will go one of two ways:
If I say 'I didn't hear anything' then the discussion will centre on how it is all a sham and nothing was perceived. With a side-order of carping about sighted tests.
If I say 'I heard differences' then the discussion will centre on how I was grievously duped. With a side order of carping about sighted tests.
Not playing. All yours. Have fun.
So the whole premise of a demo in this way is obviously flawed regardless of whether they conned people or not.