In my area.. Comcast is a monopoly. they control the cable access here.. Verizon is trying to get into the game in Portland, OR. but it will not cover the whole area.. like where I live.
Comcasts arguement about customer bandwidth narrowing is hallow. For the ammounts that Comcast charges.. they can easily upgrade their infranstructure in all markets easily.. but refuse to do it in the name of profits.