Is girls chess 'nicer' than boys chess?

I helped run the ACTJCL North Canberra Primary Girls Teams Championship last Wednesday, and it was a thoroughly enjoyable experience. Almost uniquely among the tournaments I have directed over the past 30 years there was not a single dispute, misreported result, temper tantrum or tears. Everyone seemed to enjoy themselves, and while there was obvious competition for the top places, it seemed that no one begrudged the success of the other teams. In how many other 100 player chess events do you see that happen!