Well I can't say as far as what is done to develop leaders, other than it is nice there are a variety of clubs for the kids to begin to consider whether they want to lead...but I do recall one child I thought might be a 'gifted leader', nice looking, funny guy and just super friendly across the board with all kids including my own son, and just seemed to have something the other kids gravitated towards.
His mom was pto prez for a while and she sort of had that same ability to get non-joiners to become joiners, so to speak.