It would appear that something might be going on:
A report is swirling today that the upstart network is about get its much needed New York home–at the venerable 660 AM. That would mean, according to the New York Daily News’ Bob Raissman, WFAN would no longer be a simulcast, just the 101.9 FM signal.
It’s been speculated that 660 AM could be the full-time CBS Sports Radio affiliate as soon as Monday, February 4th. That’s a bit too soon. They’ve only been on 101.9 FM since October. I don’t think that’s enough time for the audience to migrate from AM to FM. Radio is habitual, and many listeners are (still) in the habit of punching up 660 AM for their sports fix. Maybe they should wait until baseball season starts. WFAN is a big moneymaker for CBS, and they can’t afford to risk losing their audience.