I have also found this forum a great learning resource, not just with regard to the excellent tutorials on the main site and the video tutorials, but through the many interactive discussions that take place on the forum where sometimes (hopefully) conventional wisdom may be challenged and new insights gained.
Brand loyalty, or even format loyalty, is deplorable (except for the dealers and manufacturers who thrive on such loyalty). I would say that brand (or format) loyalty is the one thing that spoils the site.
When discussing equipment performance, it is necessary to give the equipment under discussion a name, just as it's necessary to give performance characteristics a name, such as, noise, resolution, dynamic range, frame rate, etc.
It's surprising how difficult it appears to be for many folks to confine themselves to the issue at hand and refrain from branching out into ad hominen attacks, of the nature of either direct personal insults, or the more subtle ploy of shifting the argument to a more personal arena which has no direct bearing on the issue at hand.