Shows make for difficult comparisons though, as people are inevitably dealing with unfamiliar rooms. If you're talking about trade shows, then it's also often apparent that some people (exhibitors) like to put together stuff that sounds impressive on a quick listen, thus often things that tend to over emphasise bass and treble.I got that impression whenever I've compared notes from shows, also from looking at many people's systems. But maybe I'm wrong, it's not factual.
By comparison, listening to systems in the homes of other enthusiasts, I get the opposite impression. Most people seem to want to achieve a more 'natural' tonal balance because they live with a system in the long term, when 'bright and bassy' tens to grate after a while.