[burn_baby_burn]

From the above site.

A lot of folks boil their ribs before grilling them and slathering on the sauce. The concept comes from Eastern Europe where Poles and Czechs prepare ribs by simmering them in water with cabbage, potatoes, carrots, and caraway seed, making a very nice pork stew.
But water is a solvent. It pulls much of the flavor out of the meat, and it can make the meat mushy. When you boil meat and bones, you make a rich flavorful soup. All that color in the pot is flavor that you can never get back into the meat. Boil meat too much and water can even dry it out by causing the proteins to contract and squeeze the moisture out of the muscle fibers.
People talk wistfully about meat that falls off the bone, but if it does, it has probably been boiled and denuded of its best flavors. What they're really loving is the unctuous barbecue sauce. That's why McRibs are so popular. They're just ground pork swimming in sweetened ketchup mixed with liquid smoke and some other flavors. Classic Southern ribs have the same mouthfeel and bite as a tender juicy steak and most important, they taste like pork, not just sauce. They tug off the bone rather than fall off the bone.