The real difference I've noticed with kids in this city is, compared to other places I've visited recently, the parents elsewhere acknowledge and/or comfort their kids if they are crying or signaling for attention. Here in SF it seems commonplace for parents to ignore their kids entirely and pretend they don't exist when they are screaming/crying on MUNI, running around at restaurants, or asking "hey mom, hey dad, hey mom, dad, hello?". Parents here either tune out or just don't care.