This is for Georgehifi especially but others can chime in.

@audiotroy 
Measurements are VERY suggestive of how a piece of gear will sound. Measurements are how manufacturers get consistency. Measurements are the best indicator of how one piece of gear will work with another. 

If I walked into your shop and you started banging on about the technical merits of high voltage solid state gear, I'd nail you down and expect you to better explain your claim. After all, that's a can of worms you opened. Most salespeople I deal with regardless of product aren't stupid enough to crack open that can of worms because every now and then they run across guys like me. I'm about to buy a new phone. I WILL know more about the phone I buy than the sales guy. Guys around here seem to like giving me jazz about "just" building an amp. I could have built an F6, F4, F3, F2, F1, an Aleph, a SIT, a Burning Amp, some Zen variation,  some tube deal, a circlotron, or many others. The decision process took longer than building the thing. I spent a lot of time studying circuits and measurements and evaluating the merits of each given what it needed to drive. In other words, I didn't go listening to mysterious boxes clueless about what was inside or what it did. My interest in this hobby is deeper than that. I must be doing something right because this things sounds better than the majority of stuff folks have tried to sell me on. And I'm sure I've spent a very small fraction of what others have spent to get something similar. 

Yes having other speakers in the room does negatively affect the sound somewhat, but when a client auditions a set in our show room they will understand these interactions and know that the speakers will sound even better in their own rooms

This is only one reason why I previously stated in another thread "Moreover, many dealership rooms are setup like crap..." (https://forum.audiogon.com/discussions/not-enough-options-for-auditioning-speakers/post?highlight=%2...)

Dave, you don't need more naysayers, but I've found the problem with multiple speakers in a room goes beyond the interaction they have with one another. Invariably the *placement* of the speakers are severely compromised. If there is any conciliation in how you have your showroom setup (and I haven't seen it), I know you're not the only dealer that has many speakers in the same room.

Given the price point of the gear you are demonstrating, wouldn't it behoove you (and all other dealers please take note of this question) to have a *dedicated sound room* with no equipment in it at all, and then populate the room with whatever equipment is being demoed at that particular moment? Granted, this is a major inconvenience to cart equipment to and from, in and out, etc., however, this would be for customers (potential customers) who are looking to drop say 50K+.

"...have a *dedicated sound room* with no equipment in it at all, and then populate the room with whatever equipment is being demoed "

Human brain/ear has an extremely short term memory, like only a few seconds, so while this sort of arrangement may seem plausible it really defeats the purpose of comparing gear, particularly when switching only one piece at a time.

@kalali

Excellent point, and I have no disagreement about the short term memory. However, doesn't my suggestion (empty room populated as needed) still beat the alternative (cluttered room) from the standpoint of equipment evaluation?