Fassteel,
I've been hunting for a long time, too (39 years, if you don't count hunting with pellet guns and .22's as a kid). My experience is that, for upland birds, a SXS is the ultimate tool designed specifically for the job. I have in my cabinet automatic, O/U, pump, SXS, and single shot shotguns, so it's not like I'm making any assumptions on any of these designs.
I don't doubt for a second that hnachaj is a good shooter and that his opinion is perfectly valid for him, as is yours. But, the key here is that no two shooters are exactly alike. Fitting the gun to the individual is critical. But, even if we are to assume all these designs are custom fitted for each shooter (which they seldom are, except for competition shooters), different designs will still have advantages for certain shooters in certain situations. "Newer" designs don't translate into "better" designs. Nor does the sheer longevity of a design make it better. Fit and purpose are the key.
In sharptail's post, he mentioned THE most beneficial characteristic of SXS's for upland game hunting - instant choke selection. Only an O/U or a SXS can give you this and, last time I checked, O/U's with double triggers weren't commonly available.
Personal choices of shotgun designs are exactly that - personal. You may as well criticize a man's preference in women. Both are bound to be emotional topics that will degenerate into mudslinging in a hurry.
My opinion: "Good" SXS's are works of craftsmanship and science that are well suited for wing shooting. They're a pleasure to shoot and some of the best examples are a privilege to own.
SS