Yes. It’s especially interesting to hear people say this when some states in the US are larger than some countries in Western Europe. For example Texas is slightly larger than France, and Montana is slightly larger than Germany. Of course, crossing state boundaries in the US does not introduce you to as much diversity as crossing many country boundaries in Western Europe. However, when you consider there are 50 states in the US, it should be reasonable to understand there can be substantial differences in habits and lifestyle.