I did listen to the Patton Oswalt episode a bit late. Yes, he was a dick to Patton. Even if the 'I don't remember your book's name' stuff was a joke, it suggests a sloppy and half-assed approach to the show that is out of character esp. considering Maron obviously takes the show very seriously.
I did like hearing more about the off-stage writing stuff Oswalt does, though.