Observation based on my time in the GTA. Amongst the D3 truck lineups:
-GM / Chev drivers tend to be the most "urbane" of the lot. Generally pretty normal people who just want a truck. Decent number of contractors (although I see plenty of Sprinters etc. in contractor crowd these days).
-Ford drivers also are generally pretty normal peeps. You do get the occasional outlier driving a jacked up Raptor or some crazy thing, but by and large its normal peeps.
-RAM drivers are almost universally moronic rednecks. Needless lift kits, wheel sticking out 10 inches past the fender, obnoxious muffler kits, weaving in traffic and tailgating the
out of everyone with no regard for public decency, nailing the throttle and making like a semi-truck with the amount of soot they toss into the sky. Imagine the trashiest of white trash - these guys are it.
But the question is why? From an outside perspective all of these trucks look pretty much similar.