[usrusr]

Having only experienced it from the outside (observing perfectly functional flocks if "Erasmusses" not making local contact here, seeing friends join such flocks abroad) I even feel tempted to say "you learn a lot about all kinds of countries, except for the one you go to". The intensity of socialising inside those groups is staggering and part of the lack of contact with the local population might well be that those just can't compete in being as interesting: answering "here" to the conversation starter "where are you from" instantly makes you the least interesting person in the room. Kind of like the backpacker hostel vibe.