My source would be General Psychology. This was discussed way back in Psych 201 in college, and is established fact. Those born with a small appendages "compensate" with long, cylindrical objects like sports cars (Corvette and Jaguar XKE), boats,big guns, and big, expensive toys. I'm not going to post a picture, but I would probably bring the average up(way up).
If bluster, gun ownership, height, and names have anything to do with it, Micheal Savage (real last name Weiner), has a half-incher. Rush probably hasn't seen his in about 20 years, so I'm not going there.
If you see some guy who owns a Corvette, a cigarette boat, and a lot of guns, maybe there's a reason besides being rich.