The article is specifically about exceptionally good restaurants that are moderately priced. And San Francisco has historically been famous for this (at least I heard about it a lot growing up in Seattle).
As someone who goes out a lot and who was courted to move to SF by people who go out a lot, I can tell you that in 2015 SF restaurant scene does not hold a candle to NYC. It was one of the reasons I decided not to move to SF.