Why weren't more people in SF watching the Super Bowl?

The Bay Area, including SF, San Jose and Oakland, is the nation's sixth-largest TV market and yet it finished 28th among Nielsen's 56 local metered markets, reports Deadline's Patrick Hipes. The area's 46.5 local rating compares with Baltimore's 59.6, which is said to be the largest audience for any show on Baltimore TV since household meters were first used in the city more than 20 years ago. New Orleans was the next highest ratings market, followed by Washington, D.C., Norfolk, Virginia, and Dayton, Ohio (not many choices in Dayton, I guess). Here's the top 10. But what about SF? Part of the explanation might center on the less-than-exuberant interest among Oakland Raider fans, some of whom consider the 49er faithful to be soft, wine and cheese elites (doubt they would put it quite that way). Also remember that San Jose-area denizens view their community as separate and distinct from San Francisco (NBC has a separate affiliate in San Jose). All of which suggests fractured loyalties. So it's a strange market - and yet Sunday's low ratings are still weird.