^^^^ This and Malina are right on. I find that many Californians just don't like to impose on others or don't have the time for small talk with strangers. People in some parts of the country seem fake with their niceness. Also I always say being nice doesn't mean you are good. It's a personality trait and/or cultural norm. Lots of good people are not overly nice and lots of overly nice people are not particularly good. I find a lot of people confuse niceness with goodness. And If someone moves anyway from California because we are so rude I suspect that person has other issues. Besides they also say people from NYC, Paris and London are rude. We are a pretty urban and diverse state so maybe that's just a common trait that people from more complex urban cultures have that's perceived as rudeness.
As to why WDW is better known to Europeans and Brazilians? That's easy. It's closer. And flying that much more to come out west doesn't really make sense to them. But there's plenty of people in North America who would choose DLR over WDW if there were more things to do here.