This was a commentary about a program in Portland called Girls on the Run, where girls in third through eighth grades learn life skills and run, completing a 5k at the end of the program. It's a great program and many girls at school have participated.
Predictably, came this editorial. I'm not going to be diligent and actually look up statistics, but I'm willing to bet that participation in youth sports is not equal between genders. And while sports are expected for boys, they still aren't universally accepted for girls, even forty years after Title IX.
So that's why girls get more encouragement. Lets even things out first.