Both comics Butters mentioned during the idea pitching segment were real! And they were both from Sunday, November 14th, meaning that part of the show at least was recorded sometime after that. The comics are:
Blondie ("the back nine at your house") http://www.chron.com/content/chronicle/comics/archive/showComick.mpl?date=20041114&name=Blondie
In The Bleachers (slug race) http://www.ucomics.com/inthebleachers/2004/11/14/
Obviously somebody with the show is a gay dweeb for having seen these.