His point isn't so much the percentage of the population urban vs rural, he was saying other countries have fewer urban areas compared to the US which has lots of urban areas, and what is classified as urban in the US is a little handwavy as suburban is tied in with urban as far as those population values you mentioned. Then there's different types of urban, there's high density urban, vs low density urban, think NYC vs LA. NYC is high density vs LA which in comparison is much lower density, and then compare that to someplace like Seoul and NYC (as a whole) looks almost rural (although some places definitely are higher density than others)
I see, but there are still enough resources in most all urban areas of the states for this not to be a problem. The way fiber optics are fed through urban and suburban areas is pretty ingenious. The main reason why most urban locations, despite density, aren't receiving higher bandwidth probably has less to do with build out at this point and more to do with how much ISP's are delivering. I think we can all agree the ISP's are just greedy. With monopolies in cities like they have what incentive do they have to provide?