I've seen one out a couple minutes run from an Ul'dah camp before (Horizon, I think).
I was on a leve, talked to him, and he just spouted off a line and generally ignored me.
The behest had already started. After 5 minutes past the hour, the behest starts, the npc walks to the areas you have to kill things, and no one else can join. Edited, Oct 7th 2010 11:19pm by Ilmoran