Which is actually kind of funny because a lot of them seem to have a higher BB than usual so you'd be able to use longer cranks and still be able to pedal through corners without running the risk of touching down. Yes I mainly ride a folding bike and prefer it to any of the large wheeled bikes in my stable for commuting or touring.

Concerning rain and road grime in relation to small wheels... we could argue theories all day of whether small wheels or large wheels are 'messier' but my experience has been that, in the conditions I've ridden and at the speeds I ride, I've thrown taller and more voluminous rooster tails and have received larger racing stripes up my back on large wheel bikes than small wheeled bikes... but of course that argument is moot since it's advisable to use fenders anyway.