My experience in the bay area.
For high end sushi, it has some super fancy places like Sawa that are very well regarded.
For a little pricy but not high end, its about the same as anywhere, maybe a little better than $30 sushi meals I've had in the midwest, but its all frozen anyway, I don't think its inherently better.
There are cheaper sushi places that are super adorable. I love Happy Sushi in Sunnyvale for its Dos Spicy roll, which has spicy tuna, spicy crab salad, tempura jalapenos, and a hot sauce.