How much bigger is the US than Switzerland? Its like 200x the size of it. Do you think that it's size and division of 50 distinct states might make that task a bit tougher?
I made the point elsewhere. Sweden is larger than California yet has only 10m population. Fiber is not just common in urban areas, you have it in small villages and even cabins in the woods.
Basically no state gets close, urban or otherwise. People here keep talking about size, rural, many states, whatever. The problem is really regulatory capture and monopolies, many states ban local municipalities from putting fiber down.