BTW, I *do* agree that Rewind will probably take a bit of listening away from WSNY, although overall it will probably help the cluster to the extent possible with these weak signals (which isn't a whole lot). It's also a MAJOR lost opportunity for Clear Channel, which could have hurt Sunny more -- AND served the market far better -- by switching 93.3 WLZT to a format like this instead of stubbornly persisting with a duplicative frontal attack that earns anemic ratings except around Christmas. There would have been some overlap with the Brew, but nowhere near enough to offset the benefits. Actually, with the hugely superior signal at 93.3 CC could still switch it to a similar format and keep Rewind from gaining any traction.
One more thing: I spend a lot of time around Chicago, and I hear Bonneville's Rewind playing in workplace after workplace -- easily more than any other station, and loads more than CC's mainstream AC WLIT. I know that's not a scientific survey, but it's so prevalent it's almost a little freaky. A lot of those businesses may not even know the station's calls or handle, but the PPM doesn't care.
BTW, while I personally really like the change at 103.5/104.3, one thing I am sorry to see go is the Harmonic Lounge.