Zaikesman, I think that Miklorsmith made a very valid point. In fact, I was part of an even more baffling experiment. This was a system with VTL monoblocks, a VTL Reference preamp, and Wilson speakers. Everyone was floored by how amazing the VTL pre-amp sounded, I had to agree, it sounded pretty damn good. Then someone in the group made a comment that listeners would not be able to detect in a blind listening test when the VTL was in our or out of the system.
So we set up an experiment substituting the VTL preamp with a $200 NAD preamp while people listened blindfolded. Not a SINGLE person in the group was able to consistently tell which was the VTL or the NAD. One is around $10,000 and the other is $200.
This brings up the inevitable conclusion that listening evaluation is probably extremely flawed in these types of tests no matter how you slice it or dice it.
I think the more proper way to evaluate equipment is to put in a component and the listen to it for several days and then make the switch. For some reason, rapid A/B switching doesn't allow the brain to make the adjustments quickly enough.
Otherwise, how would you explain these results?