I haven’t listened to Sunny FM in a while. Last I heard, the jingles were mainly RW except for some acapellas/shouts during the morning show, and the “Stuff to do” bed. I don’t know if the latter has been updated yet – I know CBS-FM kept using the JAM “here’s what’s happning” bed for a little while after changing most of their jingles, but they now have a new RW bed.
It did seem like K-Hits was still mixing in some JAM cuts when I listened to them not too long ago. I also think the RW package still sounds better on K-Hits than on other stations – stronger vocals, more lyrical variety (not reflected on the demo), and the station seems to do a better job of integrating them with the music. Just goes to show one size doesn’t fit all when it comes to jingles.