I don't think you will see a huge difference in time either...It always seemed like the butts or brisket that I have cooked, and the majority were finished in pans, with liquid, and sealed with foil have always come out within about 90 minutes, whether done that way or just left naked. If the temperature is constant, I have never seen putting it in a pan and covering it as an accelerator. Maybe I have never paid enough attention.