I don't recalll top40 radio of the 50's, 60's, 70's sounding overly childish.
some of the music was childish but the jocks generally sounded adult.
today---- its obvious CHR, AC, HOT AC, stations are using many
young sounding jocks to attract young listeners.
"Teens" don't listen to radio. Most younger music formats are targeted to soccer moms at this point.
Actually according to the latest Nielsen study, teens make up about 16% of the radio audience. About the same percentage as 40 years ago. But yes, most radio stations target adults.
True but they're listening to whatever mom has on in the car while she's driving them to school.