So, as has been said, the prank is basically remixed audio tracks for each show.
Eh... it's okay. I would have preferred a gag where they threw out their lineup and aired crazy shit, but this is better than nothing.
And it's continuing into The Cleveland Show. I can only imagine the reactions of some people when they wake up in the middle of the night, hear the chicken clucks, and think they're tripping the fuck out. Maybe that's the intention?