Well, debatable. If you look at some of these posters in the SocketSite article some actually folks with kids in SF schools are saying they are fine. Sure, small sample.
From my perspective as an SF native and whose nephews and nieces were raised in the burbs, I don't honestly believe the schools here are that bad. Come on, Lowell High School is pretty darn good. And again, I have friends whose kids went to public school here, then to Cal and ended up in grad or medical schools.