As I recall, CBS flipped 92.9 Dave FM to sportstalk and Cumulus flipped 106.7 Atlanta's Greatest Hits to all-news at about the same time, both with powerful incumbent competitors (680 The Fan/790 The Zone and WSB, respectively). There was a lot of discussion about how spoken word would work on FM vs. a traditional music format. 92.9 took a while to do well but now gets a 4+ share. WSBB 95.5 has taken over most of the WSB listenership, itself a juggernaut. 106.7 never really got any traction, whether all-news or news-talk.
I guess my question is: Has it been the format, the product, or the management? Or more than one?