That’s fair enough on the citation. I would point out that as you say, Texas and Arizona are heavily urbanized, and outside of that, very sparsely inhabited. TX having ~84% urban population, and AZ nearly 90%, that’s going to be hard to cover the other small percentage with broadband. Texas, despite being one of the “Big 8” ranks 32nd for average population density.

In other words rural TX and AZ are atypical.