Monologue Jimmy vs. "Real" Jimmy

No, I don't think that at all, but you weren't clear in what you meant initially. ;)

What? Are you kidding me? After the monologue there's probably something like 65% of the show that is still written. You don't seriously think that they just freestyle the guest segments? Why do you think he goes in and talks to the guests beforehand on every episode? It's so he can go over what they're going to talk about with him. He asks them to think up funny stories beforehand as well as give him a chance to spitball joke ideas. I realize they're not entirely scripted...but they're certainly not off the cuff. Besides that, everything leading up to the guest segments is completely written.

Regardless, I wish that he would be more like his monologue persona and am curious who is doing most of the actual writing for that, if not Jimmy himself. I'm assuming it's not him because the monologue Jimmy tends to be much wittier and sarcastic and underhanded (a la Letterman...) than what i perceive to be Fallon's more realistic persona in the guest segments. Even that I question, however, as Fallon seems to be a bit of a chameleon who was essentially manufactured for this job since a young age.