It is usually silly to compare any country with the whole US.

Instead search for the most similar state to compare with: for example Colorado has similarities with Switzerland.

Does Colorado have similarly affordable 25 Gbit fiber?

> much easier, and cheaper, to wire up a small country than the massive one

If your theory makes any sense at all, then Vermont with 60% of the size and 7% of the population should have amazing internet... does it?

I'm in New Zealand: Our internet isn't like Switzerlands (~1/2 the population in 6x the size). I use Oregon for our benchmark state.