The small wheel bias comes from near death experiences riding in traffic outside the USA. Wheel size doesn't have much influence on speed, but it has HUGE impact on pavement ability.
Please take a look at the following images:
Do you believe a person riding a 700c road bike would have some advantage going from A to B under these conditions over someone, let's say, riding a skateboard?
I am in the market for something that is a conventional bike replacement with Brompton folding capabilities. I just can't find it.