What determines the leading team?

I am super curious as to what determines the winning team for the "Snowball Fight". Though I suspect it's because Koto is in the top spot for 5/6 categories. 

It might be that, but I have a suspicion that there might be a a bit more people on green team- or at least it seems to me there's always a lot of green people online. Also if we extended the leaderboard to 50 places, I suspect you might see a lot of green names that are lurking just under the 10 place cutoff which, if there are as many of them as I suspect, might mean green team might also have the most accumulative points too.

The winning team is the one whose members have thrown the most snowballs collectively.  (The other stats are just for fun.)  Theoretically, you don't have to have any team members on the leaderboard to win, but it's very likely that the winning team will show up heavily, because usually the winning team has a bunch of people who are spending a lot of time hunting and throwing snowballs, rather than just throwing the ones they find over the natural course of playing the game.  But, if a team could somehow inspire every member of their team to put in just a little extra time towards snowball hunting, and if the other teams have a lot of members that aren't bothering to play at all, they just might squeak out a win even if no one team member ends up throwing hundreds of snowballs.