That's the marginal median 2 br rent. Very few people living here for the last 3 years or longer pay that much. The true median 2 br rent is much lower. I'd venture to say even maybe a third lower.

EDIT: I can't respond to the comment below, so here's the other thing: rent control guarantees no rent changes, but you don't need it. Personal landlords don't change rent that much, often they prefer keeping tenants and handling cost pass-throughs rather than raising rent to maximize revenue. I live 4.5 years on a $1.5k rent / 1 br in Portola that terminated only because I moved away from the Bay (back now).