Studies have shown...actually I don't know if anybody's bothered to study this.
But is it possible that piano-playing teenagers are less likely to "head down the wrong path," i.e. do drugs, get into fights, etc.? I personally have more respect for my mind from having played the piano so long that i wouldn't think of touching anything that would hurt my brain.
And the benefits of music as stress-relief? I know of a kid who was constantly in trouble, getting into fights, etc. Parents tried everything, punching bags, etc., then started him on piano. Problem solved!
Could we win the war on drugs in this way??? And no more complaints about violent lyrics.