Ya wow, I was taken by surprise when I saw the thread freddy had posted on this...I had no idea, what a treat.
On the jam idea being in the setlists...
Technically...
I think, the jam>song deserves to be there seeing the simple fact that the chord changes are different in the jam...even tho you can play/tease the same riffs/rythms in a different key with different changes as the song that was announced...