Of course, there are regions in the world where it goes faster, that's down to the local culture.
I can say that in my country the "trust" seems to come sooner, but the loyalty might be a little bit weaker in the long therm. And I have a lot of examples in my adult life. People are friendly, and they are very pleased to make the "neighbors" feel good and welcomed. That is a fact. But I have also seen, from the other "point of view" that the trust studently can be trapped when something triggers other emotions, like jealousy, or mistrust due to lack of knowledge.
Just playing a little bit the devil's advocate ;) I'm not as negative as I implied in my comment!