I am flattered. We began using "Today's Hits and Yesterday's Favorites" on Sunny before it was "Sunny", back in 1994 maybe, before I even owned the station which is now Sunny. Actually, it was the slogan used by ABC Radio Networks for their AC format. Not only are there a zillion variations, there are a lot more "Sunny" stations in the US since we adopted it in 1998, the year our "Sunny" was born.
What next, Seattle adopts "Today's Hits and Yesterday's Favorites" and KJR adopts "The Jet" which I've been using for close to 15 years. I suspect there are also a lot of "The Jets" but we have the actual call letters. Of course that doesn't matter much anymore.
I also note that within a year or two after we launched "The Quake" ("shaking up the Coast", "a tsunami of Classic Rock"), KPQ in Wenatchee rebranded as "The Quake". We recently launched a classic country format as "Timber Country". If someone else rebrands as Timber Country, I'll start thinking conspiracy.
What does matter in any business is consistency. I understand the need for the music to evolve, along with the talent, but branding is important.
I thought KPQ had been The Quake for years? Also, there's one branding that's fairly safe, Bigfoot Country 107.3. How local of a name is that? I think you're pretty safe with Timber Country as well.