I'm not going to get into how I know these things. Whatever you're thinking, you're probably right. Anything that you read in books/on the web has likely been researched by FBI folks/organized crime "specialists". These men are not in the know, they take whatever the Outfit gives them, which is barely anything at all.

I'm from the streets of South Side Chicago, I'm 100% Sicilian, I always keep an ear to the street & always have. This is how you gain real knowledge, not by going on Wikipedia.