I could be wrong, but I believe that Alpharetta is part of the Atlanta metro. It's result should be merged into Atlanta. IMO the results for all Bay Area cities (SF, Palo Alto, Fremont, Cupertino, San Jose, Santa Clara, Sunnyvale, Mtn View) should also be merged into a single result.
Why?
The housing prices are very different. Heck, SF alone has a huge price range.
I agree that NYC is too coarse.