Why would you not want to play the biggest songs on the station as much as you can? Now, I DO agree that 158 is a little high. I honestly don't even really know how that's doable. That's...what, like 23 spins a day? Jesus. ANYWAY, we have a high number of powers (7) at my station, but they are the songs that are PROVEN hits for THIS market - why not bang the hell out of them? Rayne's exactly right, unless you're a VERY adult-leaning CHR, the days of people consciously listening to a station for 8 hours a day are over, so you better make sure you're playing a song that they love whenever they flip to your station. Even though it's a rock station, I like the philosophy that WJJO in Madison uses. Cume-core. Every other song on that station is a PROVEN hit. Builds the cume, then to keep the TSL and make your P1s happy, you put in the new music or the flavor old skool record. Take that philosophy and put it on steriods, and you've got a good CHR that's going to build a lot of cume and keep a respectable TSL. I don't pretend to be a genius programmer, but it seems like a pretty good philosophy, right?
Btw, somebody mentioned ZYP in Huntsville during the 90s. I grew up in Huntsville...trust me, ZYP was so successful because the rest of the radio stations in town SUCKKKKKKKKKKKKKKKED. They could have played their powers 30 times a week or 300 and nobody would have cared because it was either that, Oldies, or Country.