I'm not sure how things are in the States, but North of the Border it looks like the Children of baby boomer seniors are the best bet for Radio Audience down the road. (more than in the past...)
http://finance.sympatico.msn.ca/savingsdebt/insight/article.aspx?cp-documentid=4697124
http://finance.sympatico.msn.ca/savingsdebt/insight/article.aspx?cp-documentid=4697124