Haven't heard that. Bet Oldies goes with Real Oldies and IMUS. Maybe B106 goes CHR/Pop/Hot AC?
Or, is Double O taking over? Citadel has been rumored to be considering paring down a number of markets.
They are in a good position in the market right now strategically. Any changes must be prompted by a desire to take Clear Channel down or, more importantly, reduce non-line costs.