I don't know why the long cook time and frankly it don't bother me. The only drawback so far is it puts a crimp in planning.
I had planned for it to be done around 8:00 AM so I could get it wrapped ant take a two hour drive to a family reunion. I want to pull it and start serving around 12.00 PM.
So much for my plans. I took it out of the smoker at 9:10 Am @ 193 degrees and quickly wrapped in two layers of foil and a towel, into the cooler.
Made the trip and when we started serving the compliments started. Almost busted my shirt buttons with the swelled chest.
The real test? With all the tables full of food and several different meats I did not have any to bring back home.
So 14 hrs total cook time produced delectable pulled pork. I'm not unhappy
Added note: I forgot to mention, this was a boneless butt.