I'm the Bruce who visited Bob in GA. Bob's hogs are raised much differently than the hogs you buy in the stores. The pork form stores is bred and fed a scientific diet to increase yield and reduce fat. This is what the public wants.
Bob's hogs are fed corn, slop, and whatever they can root for around the farm. They will take a year to get to 100 lbs or so. The meat is not as lean as commercial pork but it is much more flavorful. The difference between a "traditional" raised hog and a "commercial" one is the difference in flavor between "Select" and "Prime" beef.
I've got a shoulder in my freezer from my last visit. I need to cook it soon. Yummm.