So I went looking. Boston and LA are the only top ten markets where that is the case. When you go to the top 20, add Seattle, Phoenix and Minneapolis-St. Paul. 5 of the 20 largest markets is hardly most places.
KSFO San Francisco dropped him in 2012. As a result, iHeart put him on KNEW and build a syndicated station similar to Talk 1200 around him. They did something similar in LA with KEIB. I notice that he recently returned to KSFO. Cumulus threatened to drop him from all their talk stations after the Fluke incident. Only one station, WABC followed through on the threat, and he was picked up by WOR after iHeart bought the station. I don't know if WOR is secondary (none of the AM talkers are doing well in NY), but it's not the station it was on originally. KMBZ Kansas City dropped him from the FM signal. Just on the AM.