What's the deal with minivans and their drivers?

[00GTP4ME]

Tell me if this scene is familiar:

You're on the freeway and there is a minivan putting along while going several miles under the speedlimit and cars are flying by trying to avoid rear-ending the slow, clumsly obstruction. You then proceed to pass the vehicle. As you near the driver window you see either a Mr. Rogers look-alike or a middle-aged woman in glasses who is nervously clutching the steering wheel with both hands. They putt along with both eyes piercing forward almost like a robot. I really try not to be prejudice against anyone in anyway, but I have to admit that the frequency of which I'm subjected to this scenario and it's creepy connection to minivans is getting to me! To all minivan drivers, have you always driven like this, or is this a phenomenon that occurs after you begin driving these irritating vehicles?