Caffeinated Cities

A recent study investigated caffeine consumption in major US cities (or, as I like to call it, "Caffeination Across the Nation"). Read the full article, or just skip to the tea results, which I've copied below.

Most Tea Consumption (Green tea, iced tea, black tea):
1. Miami
2. Tampa
3. Washington, D.C.
4. Philadelphia
5. Atlanta

Least Tea Consumption (Green tea, iced tea, black tea):
1. Minneapolis/St. Paul
2. Detroit
3. San Francisco/Oakland
4. Seattle/Tacoma
5. Boston

Seattle and Boston were non-shockers for the "Least Tea Consumption" list, for obvious reasons. San Francisco, on the other hand, was completely unexpected. Perhaps it's because of the "(Green tea, iced tea, black tea)" specification. What about other types? Had oolong, white, and pu-erh been included, would SF be off the list for "least tea consumption?" Another arguement for SF's low level of caffeination: "...considering how much it costs to live in San Fran (and New York City, which was also on the list), I'm surprised anybody there can afford caffeine once they get done paying the rent." Two points for Widge at NeedCoffee.