Take a look at this data coverage map from Sprint. Orange is EV-DO, Yellow is 1xRTT:
That spot with lots and lots of EV-DO, disproportionate to the rest of the country? That’s Alberta. The entire province is a mere 3.5 million people.
The isolated (but large) blob in the northeastern part of the province is centered on Fort McMurray, population 47,000. The EVDO coverage area is probably several thousand square miles.
Three guesses where all the oil is 🙂