Honestly, in this game it could be either. I better not spoil it.
After a week, I'm 34 hours in, and y'know what, I gotta say it's got some pretty good truckin'.
After seeing how flimsy the bike handling was I wasn't expecting much from the trucks, but they're pretty fun. Not Spintires or anything, but they feel properly weighty, awkward to maneuver, and I especially like how they turn into stilt-trucks when you drive into water. (I'm starting to feel like the game is pandering to me at this point) After I finished paving the highway all the way from the north to the south in the Central Region, I spent a good amount of time just driving up and down it delivering packages between the different stations. Once that got boring I continued following the story missions west. It's got a great sense of being on a dangerous expedition once you have to start huffing it over the rocky mountains.