The old rules about demographics are completely antiquated--stuff that Nielsen/Hooper/Arbitron rely on that was developed in the 50s...age breakouts like 18-24 / 25-34 / 35-54...are completely out-of-whack with today's reality. Eighty is the new 60. People live longer, work longer and share common interests more than ever with earlier generations. Ratings mean nothing with the manipulative techniques stations used to game the PPM system. The 3-4 major radio groups are fooling themselves thinking they know the way to success. Bring back personality radio with local presence and you will knock the socks off the Pandoras, the iHearts and nationalized formats in a iHeartbeat!
Of course, the music isn't the message...it's the presentation, the music selection and what song follows next, the tempo, the jingles, the graphics, the flow, the local relevance and PERSONALITIES who know and relate to the LOCAL listener in a fun package. Entertaining personalities, not liner-card readers or voice-trackers working in another city 1,500 miles away...or, gasp, Ryan Secrest, being everything to everybody...
CBS knows more about this than anyone...but they are driven by the trends as much as anyone else...