I don't really think that the west coast has a VERY big influence but it has a little. Like when I'm in another part of the country and say "Hella", cats look at me like "what did you say?!" But if I did hear someone using west coast slanguage, I'd think it was tight that not just us used it, and it would give me the impression that the west coast WAS being a influence, and thats a very good thing.