Maybe be some bizarre coincidence you personally really do "see so many Minis and Smart FourTwos on the road," but that is not representative of the entire American car population.

Trucks and mid-size sedans are by far more popular than compact cars. Source: http://blogs.cars.com/kickingtires/2009/01/the-top-10-best.html

About 20 to 30 thousand Mini Coopers and FourTwos sold last year. The Ford F Series sold half a million trucks last year. Sources: http://www.autoblog.com/2008/03/25/u-s-smart-fortwo-sales-so-strong-penske-wants-15-000-more/ and http://blogs.automobilemag.com/6271167/car-news/2008-mini-cooper-us-sales-hit-a-new-peak/index.html.

Almost the same thing happened to me when I was selected for Jury Duty.

The prosecutor asked me if I'd be willing to convict someone based solely on testimony from the victim (paraphasing). I said "No, there'd have to be some kind of evidence." I was immediately dismissed by the prosecutor, using one of her for-whatever-reason juror dismissals.

Another guy said, "99% of people who are arrested are guilty." He was still on the jury when I was dismissed.