Do you really think the size of your country is what matters?
United States 83 people per square mile
Norway 34 people per square mile
Sweden 54 people per square mile
Distribution is probably more important than density but much harder to sum up in a single number.
Righto, it's all about distribution. Well, mostly.
Sure the US is big, but much of that area is very sparsely populated. So while it make sense network connectivity is slow in the middle of Wyoming, there is no excuse for the internet to be dog slow in places like the Eastern Seaboard. I remember reading somewhere that New Jersey had a higher population density than any principality in Europe.
Something like 50 million people live in the corridor between DC and Boston, which is an absurdly high density given such a large area. There is no excuse for infrastructure to be lacking here. Unfortunately we have horribly asinine telecom policy (amongst others) and so we lag behind most of the developed world in this area (and many others). But hey, at least everyone here that has never visited another country still thinks we're the best. So we have ignorant confidence, and you got to smile at that.