To avoid confusion, I think that we need to distinguish between BBQ and "North Side" or "tavern" ribs.
BBQ is pretty well defined by now, and it involves smoke. The Chicago rib houses, with the aquarium cookers and lump charcoal, while cooking a little hotter and faster than, say, a NC whole hog, are well within the BBQ tradition, I think. Ribs don't have 6 inches of meat and a layer of pigskin; they can handle the quicker treatment just fine. So, I take issue with those who call this "grilling," since the heat source is pretty far from the meat on the South and West Sides.
Apart from the cut of pork, the North Side, tavern rib places are entirely different. While it's not BBQ, I wholly enjoy, from time to time, a succulent slab from Biasettis or Gale Street or even some of the many, many pizza places that use their ovens for double duty. I guess I don't see how folks can enjoy slow-cooked, falling apart pot roast, short ribs, or ox tail, but eschew completely the taste of soft, succulent, long-braised pork ribs. Even Alton Brown devoted a whole show to oven ribs. Other good mushy ribs can be found at home in my red sauce or in the classic Italian dish with cooked-down, caramelized milk. Just don't call em BBQ.
PS, my sleeper for great sort-of BBQ ribs is Fogo de Chao. Long-cooked near smoldering hard wood. That's BBQ, right?