I don't know about the rest of the country, but since I'm currently sitting in the EPB market that was one of the two area submitted to the FCC I'll have to disagree with you.
Our entire local service area is (more or less) fiber ready, with full speed access available from office complexes down to lower-income residential areas. The sections that initially rolled out weren't "Come to our city" showplaces, but instead established areas both commercial and residential.
At my home (in an average suburban neighborhood) I pay _I believe_ $70/mo for gigabit access (which btw is bidirectional... I test out at around 930mbps both upstream and downstream to the EPB central servers).
And since this is Chattanooga, there are plenty of backwoods trailers and rural houses that are really enjoying their new high speed access without having to be in a "highly profitable" section of town.
And believe me, the areas here and there that don't have access yet are pretty much champing at the bit to get it and be able to drop Comcast like a hot potato. (Which might I add, you should see the Comcast ads around here. They almost seem desperate, but that might just be personal bias)