I have also noticed a couple of things about HD truck demographics here: first, do not go to the Pioneer restaurant here in town in a non-Ford product. You WILL be escorted to the door or likely will not enjoy the delicious pancakes well. Most of those in my area that inhabit this restaurant use the trucks heavily for work-related duties and they will spend the money it takes to outfit their HD truck to meet their needs. It seems that Ford has placed whole focus on the use of its trucks for pulling and stability while pulling. This makes them very popular among the Pioneer patrons. This is NOT to say the others do not pull well as they all do, merely that it seems Ford primarily wanted a pulling truck as evidenced by its size, weight and some features which really would interest pulling-type people. They also seem less manuverable without trailer than perhaps the GM or Dodge product. Second, as many of you know, my good friend has a GMC truck--one which I have likely driven nearly as much as he and like. It seems to me that if one wants a highly manuverable daily-driver type diesel that has a lot of capability without much compromise, GM is a great choice. This may be the reason I see so many pulling travel trailers with them, as we also see here in WNC. It seems an excellent vehicle for those who pull alot, but then would like to unhook and go into town and be able to park somewhere. I have felt this is also why they are popular with magazine editors, they handle the least like a big truck of the three. It seems to me most of those who buy Dodge in my area do so because of one thing: the engine. My carwash guy has a 2500 Dodge, and he tells me weekly about the things he dislikes about it--yet always finishes by saying he loves the engine. That said, he says it is the best truck he has ever had--although the first HD truck. He has had all three brands of 1/2 tons over the years. He does not go to the Pioneer restaurant though for the reasons noted above. This is what I have observed in my area, but may be influenced in part by the dealer network which is heavily Ford. That said, I do not see many I know changing brands much once they have bought what they want originally. I would say roughly 80%+ of my locale's HD trucks are Ford's (a lot of them 2008) with very few GM and Dodge products among the locals. In the vacationers or passers through, it is more equal between the three, except at the Pioneer.
John M