'The Sopranos' only reflected the tenor of how things are done in New Jersey. They didn't invent it. And I say that as a fan of both 'The Sopranos' and New Jersey.
I write synopses after the book is completed. I can't write it beforehand, because I don't know what the book's about. I invent something for my publisher because he asks for one, but the final book ends up very differently.