This reminds me so much of an issue in sportbike and car forums. Most people that buy a new exhaust and/or header for their bike or car write in claiming how much faster it FEELS. Then when someone goes and does a dyno test of the thing they make as much, or less HP than stock.
It's a placebo effect.
I spent $5000 on a set of separates, I'm SURE it sounds better than my old $500 AVR.
I'm slowly learning (and have been in this game for a LONG time) that things like speaker placement and room acoustics are far more important than AVR-X vs. AVR-Y or speaker-X vs. speaker-Y.