This reminds me of the story of a friend trying to sell a very high end intrgrated amplifier to a trader friend of his.
The potential customer owned a limited series speakers from Kef, some of the most expensive speaker ever designed, and challenged them with a blind testing against his current amp, pretty good too in absolute terms... but, according to the seller, in a much lower league.
He told them "if you, the seller, can tell apart your amp from mine repeatedely, I buy your wonder cash".
They couldn't... although the amp they were trying to sell must be the best review piece of high audio equipment of the last few years...
Cheers,
Bernard