It varies from group to group, I think. It is not uncommon for people to allow others to take the charge, which is how there are situations where a singular leader or two will emerge to make all decisions. However, in those cases, there can sometimes bring out resentment when people disagree with the leader's choices.

On the other side, there are situations where too many people wish to take charge, and the personalities clash more openly. Going by the profiles, we have a lot of people here who seem to have some sort of leadership trait. Depending on how true that is, we may end up facing a situation more like this than the former.