What's new is that Tufts University agrees!
The Cradle of Liberty Council commissioned a respected psychologist at Tufts University to give some scientific basis to what we already know. He conducted a 2½ year study complete with control groups and tracking data to come up with a number of heart-warming results.
The results were summarized in an article in the "ScoutingWire" newsletter by BSA Communications Specialist Hayley Cordaro, and can be found at: http://scoutingwire.org/how-scouting-promotes-positive-character-development/
The study was done by Richard M. Lerner, professor of psychology at Tufts University, who specializes in youth development. He compared Cub Scouts to a control group of same-age and same-everything-else. He compared Scouts who stuck with the program to boys who dropped out. He compared Scouts who were active to Scouts who rarely attended. He compared Eagle Scouts to non-Eagles. And so on.
As a sample of Lerner's findings, here's one paragraph from the ScoutingWire article:
who attend meetings regularly reported higher trustworthiness,
helpfulness, kindness, and thriftiness, higher levels of hopeful future
expectation and goal-setting, better grades, and a greater connection to
nature as compared to Scouts who sometimes or rarely attend.