In the Math.SE 2012 Community Moderator Election there are only 2 moderator positions. To me this seems to be too few - considering the amount of questions (51,252).
If I understand correctly the User Experience SE has 3 moderators, and there are less than 5000 questions in total.
So, can someone explain why are there only two moderators on Math.SE? Why not 5, 10 or 20?