Actually though! They don't have these over-developed dog ears we all pretend we have, and they're not listening the same way. When they walk in and say something, you know you've got it. (Same goes for people at church, which is how I know my Tele is good even though I sort of hate it.)
When I picked up my Les Paul and played it after in my A/B comparison for her request, she spoke to it directly and said "well, you tried."
One thing I say about my favourite local beer is that it tastes how I expect beer to taste. My DGT just sounds how I expect a guitar to sound. It's perfect for me. (I also know a lot of people don't like my favourite beer, so different strokes for different folks.)