It depends how much people move around as well. In Nuuk, people will either be coming from outside Greenland (which will catch attention), or they are likely to have lived there a while and to be embedded in the community.

I grew up in the forest outside a town of 30 000 people. It's not like the city folks all knew each other, but they all "knew each other" in the sense that within the first 30 seconds of conversion they would place the other person within a family tree.

The line "I know your father" in my dialect is so common it's pretty much a local meme.