Another Epic Fantasy Discussion

What makes Epic fantasy Epic fantasy and not just traditional, urban, or any other sub-genre is a well-worn conversation. One that I'm kind of bored with, actually. It's been discussed enough that the informed have come to a general consensus (scope of setting/cast/stakes, etc), the uninformed bumble in that general direction, and the hair splitters try alternate arguments to come to the same conclusion. (No insult against hair splitters, as I've split many a hair myself.)

BUUUUT, as I was watching the most recent episode of Extra Credits, something new in the conversation caught my attention.

In my anecdotal review of fantasy fiction, I find the hero's journey to be incorporated more frequently into epic series than in traditional fantasy. Epic books by their very size allow more space to follow the many steps of the journey. And it made me wonder, is that an easy marker to distinguish between the two? Is a traditional fantasy more likely to skip over the refusal of the call than is an epic fantasy?

Discuss.