More likely is that all the old fucks watching Fox fell asleep with the TV on...Surprisingly, Gutfeld on Fox News outdraws all the late night hosts. I suspect viewers were tired of a steady diet of liberal politics on the three legacy networks. They decided to watch a show that openly espouses conservative politics but also makes them laugh.
I have caught "Gutfeld" a couple times. He and his panelists are pretty funny. He doesn't adhere to the standard format of a celebrity telling some silly, tired anecdote and then proceeding to promote their new project. I do kind of like the silly stuff Jimmy Fallon does with guests though.