CBS Radio owns KYW, WPHT, WIP, in terms of spoken word stations in Philly. One is all news, #2 in the market even though on AM. WIP is the top rated talk station in Philly at 94.1, yes they are Sports/Talk. That pulls in the desirable demo, especially young men. Guys like WIP and WPEN, both Philly centric Sports/Talk stations. So two of Philly's spoken word stations that are successful are owned by CBS Radio.
1210 WPHT apparently is billing very well, according to some here. So their ratings may not be great as they get beat by the NPR News/talker WHYY-FM. But bottom line is they are making apparently very good money and remember they are an AM station, not an FM.
Frankly I think WPHT was smart in what they did. They have live and local talk in AM drive, in mid morning, and PM drive. They bring in Rush from the bird, for his 3 hour show in the afternoon. WPHT has the best of both worlds. They air the most popular national talker, Rush, and then offer their conservative audience local talkers so they can call in and participate [Rush takes very few phone calls, because the show is all about him]. WPHT's Achilles Heel is first they are AM not FM, so the younger demos don't tune in. Second, political talk skews older too. The younger men want sports, talk about sports, sports stats, interviews with big sports figures, etc. So bottom line Julius I think WPHT is doing rather well and the bosses at CBS Radio aren't about to mess with 1210, yet. Maybe some day in the future, but not today.
WPEN tried being on AM, didn't do much, but moving it to FM made a difference. 97.5 WPEN has a reasonable piece of the Sports/Talk market in Philly.
WIP AM now WTEL 610 is CBS Sports Radio. Personally I like Jim Rome's show, but again its on AM, and the younger men aren't going to tune in. Would CBS Sports Radio get better ratings on FM, in Philly? Might. I get tired of only hearing about Philly teams on both WIP and WPEN, so I also tune in to Fox Sports Radio 1290 Wilmington and sometimes to 610 in Philly depending on what they're discussing.
So WPHT has a lot of competition from other Philly talk stations and as long as the cash is flowing in to 1210, why mess with it. It's all about making money.