Epic Fantasy Chat

Over at Clarkesworld Magazine there is a giant discussion about the question of epic fantasy - what it is, how do we recognize it, why do you write it - and there are some heavy hitting authors chiming in:
Patrick Rothfuss: Honestly? I'm not sure I do [write Epic Fantasy]. As I mentioned above, if you think Epic Fantasy means "big" fantasy, then yeah. Sure, I write it. My books are long.
But if Epic Fantasy means a story that centers around clashing armies, apocalypses, and other titanic, world-changing events, then that's not really me.
I don't care so much about making a distinction between epic and urban and arthurian, and all the other boxes marketing departments put fantasy work into.  I'm just happy so much quality fantasy is being written and published.