There are lots of people who don’t rate Naim and also don’t post here, so I’d agree it’s not an unbiased sample, though I see lots of non-Naim suggestions here too.
FWIW, some kind souls were just explaining to me on US site Audiogon that, contrary to impressions and some posted remarks, they do permit comment from people not currently resident in the USA. Local effects apply in lots of places imho.
Mind you, like many of us on this site, a large slice of those posting there are fans of (say) Wilson, Well Tempered, Martin Logan, Krell, Shahinian and other ‘local’ brands. It is certainly true that a greater % of dealers in the UK carry Naim, Linn, Spendor, Neat, B&W, Michell, Quad, ATC and other UK brands than is seen in equivalent US dealers, and you get a slightly different brand mix in a typical shop in Sweden, Germany and Japan too.
Similarly, people recommend what work well for them over brands that they have rarely encountered. I am not sure that that is, or should be, a surprise.
Dealer networks, market penetration, product longevity and brand synergies and local market economics in one or more countries may all be a diversion from this thread anyway. After all, we are all just trying to help, and if people get advice that leads them to good kit that they end up liking then I’d suggest the exercise has been worthwhile.