My uncle is service manager at a large ford dealership. His best friend of 30 years owns a GM dealership, and his son is Vise president of large dodge dealer. HE got me few facts from those three over the weekend. This is based on 2011 models as 12 are still out and 13's are starting to sell. 3/4 diesels is what he opted on. Ford has been by far more trouble-some than the other two. Anything from the engine to tranny problems and he doesn't like the idea of lifting the cab away from the bed to fix. The dodge had less probelms on the engine. It is proven over time. Although there were some issues and more trannies than anything else. GM faired the best. Least ammount of work done on a Dmax and tranny. He said those they seen were messing around and uncalled for. My uncles took all there records from 50 serviced trucks that came in with issues for 2011 model year. Maybe that year was better for some and worse for others. In my area most 3/4 tons are hooked to a 5th wheel livestock trailer or some sort of concrete, conscrtuction business. So they wanted to see where the problems were (type of work there doing) vs the farmer coming into town for coffee and sitting at the livestock auction (as my uncle called them , Ice Cream Trucks)
So whatever this tid bit of info is worth to you but my uncle is still Die Hard FORD!