Look at the other "Amps" that CBS has signed on around the country. They were designed to take a chunk out of the big Clear Channel CHR in that market. None of them have beaten them yet, but it takes time to establish an audience. Amp in LA after initially faltering is now becoming more competitive with KIIS-FM and is a top 10 station. Amp in Detroit is still plugging away against WKQI. Even Now in New York continues to battle against Z100 and they're not anywhere close to beating them. The reason? It's easier to sell a top 40 station in the big markets than an older skewing format. It's better to be the third or 4th choice 18-34 than number one 35-64.
CBS has been very patient with these other Amps, and they have a long term strategy here too. It's similar to the one Hot has. They are both preparing for Life After Matty. Eventually he will hang up the cans...and when he does it will be like shaking the radio snow globe. Kiss will undoubtedly take a big hit, and it opens the door for all of these other stations. CBS & GM are willing to wait it out, and let the chips fall where they may. Once they do there could be a few format adjustments among the pop stations, but I don't see 103.3 returning to classic hits. Like the sports radio battle, this scrum will be a protracted one.