185 is just barely done in my experience with my thermo...I'd consider that a chopping/slicing butt. Due to limited time, I was only able to hit 185 at the Army game and the butt had to be chopped up because parts of it couldn't be pulled, even with bear claws. I cook to 200-210 for butts that literally fall apart when pulled. They are hard to even get off the grate in one piece most of the time. It's really hard to overdo pulled pork...anything up to maybe 230 internal temp is fine, and even then it depends on how long it's there. I know a few folks who go 14+ hours on their pulled pork at about 225-230 cooking temp.
When you say taking off the foil, you mean you put it back on the cooker with foil? That will definitely speed up the cook. Also, a big green egg, given it's relatively small size and heat holding abilities should reflect a lot of heat back, so I would expect a quicker cook.