Not a single one of us has said we know it all. Please stop accusing us of that. All we have said, more or less, is that you cannot definitively say that Unit A sounds different/better/worse than Unit B without taking care to do the tests in a way that prevents the tester's bias from influencing the results -- that bias includes both your opposition's bias towards uniformity of sound AND your own bias towards non-uniformity.
That is all I would like you to acknowledge. Just say the word and this whole ordeal can go away.