I ride my bike a fair bit and can you called it. Any time i am passed dangerously close it is ALWAYS a short-box pickup.
One road I frequent is used by large commercial trucks (dump trucks). These guys are professional, and move way over giving me a LOT of space. oddly enough, the pickup drivers watch the dump trucks do this, and yet refuse to move over even slightly?
i'm not sure what it is about people in pickups, but they need to do a better job educating the drivers as well.
Like seriously, if you watched a dump truck move, why were you unable to do this as well?
it isn't just about "visibility" but there seems to be some attitude problems around pickup truck drivers.
If you see a pickup with some company logo, 90% chance they will be decent and give you space. You see someone in their "pavement princess" all washed and polished, no F'ing way they will move over.