What appeals to the listeners of the different stations

I strongly believe that each of the BBC radio stations have different listeners.
For example,Radio 1 has a young and vibrant audience who are mostly between the ages of 16-35.They're into House music and Hip-Hop and current Pop.They're definetley youth based and vibrant.
Radio 2 has a slightly more sophisticated and more mature listener.It has shows like Terry Wogan's morning wake-up and Alan Titchmarsh's Melodies for You,although it does diversify with Chris Evans and Dermot O'Leary.A station for the mid-thirties to 50s.
Radio 3 has a different range of listeners altogether.It focuses on the Arts,Culture and Media and Classical.A much more high-brow demographic.