I wouldn't call it accurate. Generally there are two major providers in a area that have saturation marketing. Then you have CLECs and independent ISPs. They

I wouldn't call it accurate. Generally there are two major providers in a area that have saturation marketing. Then you have CLECs and independent ISPs. They tend to focus on direct sales to business so the public isn't as aware of their existence. Typically you'll have 3-5 of these in a market. After that you have the mobile data providers (Sprint, Verizon, AT&T, Cricket, Clearwire).