I don't know how you can jump to that conclusion. Provo is one of the few municipalities with a fiber network already in place. Combined with Provo wanting to get out of the fiber business itself makes Provo uniquely suited for Google Fiber. Google probably didn't consider the fact that the NSA building was 20 miles away at all when making this decision because it has very little to do with their deployment. The NSA would tap backbones, not last mile fiber deployments.