Are you ready to commit to watching an hour or an hour and a half of a talk program where there a two people you don't give a fuck about are guests and finally someone you do care about shows up 45 minutes into the program. If you have Zsa Zsa Gabor, Joey Hetherton and then Muhamed Ali shows up late in the program you might be less inclined to watch. So, chop it up into small segments and you get more views.