Gender differences in America (Tannen 1992):

Boys
Girls
Activities are central.
Best friends are the ones they do things with. Best friends are the ones with whom she sits and talks,frequently telling secrets --the fact that they tell secrets, and the way they talk to each other make them best friends.
Tend to play in larger groups that are hierarchical
Expected to use language to seige ceter state by exhibiting their skills, displaying their knowledge, and challenging and resisting challeges (ritual opposition)
Bond by exchanging playful insults and put-downs Bond by talking about troubles (chit-chatting)