Why is it that everything cooks so much quicker in my Pitts & Spitts offset vs my WSM? I put two 6lb pork butts and one 12lb packer cut brisket (that I cut in half at the point/flat) around 9:30am this morning and it's now 3:30pm and everything is up to around 170F. I even keep the same temps that I did in my WSM. My WSM would have taken about another 4-5 hours for the butts to be done...