[Sayrus]

Extrapolating with this method, large cities should be as well equipped as Switzerland.

Los Angeles has 10x the population density of Switzerland and around the same population density in urban area. Same for Washington dc, San Francisco...

It doesn't have to be an all-or-nothing. Distance between cities may be large, but the order of magnitude is closer when comparing within cities.

[ryandrake]

Exactly. Whenever anyone trots out the "Bbbbut the USA is too large and sparsely populated to have X!" excuse, ask them why New Jersey doesn't have X.