Municipal systems do not “crowd out” private providers any more than the New York City Subway “crowds out” private taxi cabs and car services. To the contrary, studies and anecdotal evidence repeatedly show that where municipal systems take on the expensive task of building network infrastructure, the number of private providers increases.
Comcast Brags About Lack of Broadband Competition in America
The next time you hear someone claiming that the broadband market in the U.S. has plenty of competition, remember this statement from Comcast CEO Brian Roberts.
And so each of the last two years, we have had modest increases in the cost of the broadband service, and yet we've had tremendous sales. We're 33%, 31% penetrated. We hope someday all of America has broadband. So the goal would be 100 or 90 [percent take rate]. We have one competitor.
And over the course of that 2011 interview [pdf], Roberts makes it clear that he (correctly) regards DSL as a very weak competitor. The only problem Comcast has is in those few markets where they overlap with Verizon's FiOS (or, left unstated, in areas like Chattanooga where the community itself has built a technologically superior network).