On the main point of the article, I do agree that a lot of ideas fly higher in San Francisco than other parts of North America. I see "Highlight" as a good example of this where an app finds a lot of early adopters in a small area but it becomes harder for that kind of ubiquity to happen somewhere people aren't as fascinated by new technology like people outside of the valley are.
I believe that a number of communities like this end up being "geek ghettos" on account of this.
I believe that a number of communities like this end up being "geek ghettos" on account of this.