Hi,
Working at a place where we smoke briskets and pork butts regular, my teammates and I have had to try lots to make our smoke meats come up nice - juicy - and the pork pulls easily.
That said, we figured out that 200 seems to be the best cooking temperature. We'll smoke a full bone-in pork butt for 9.5 hours.
We smoke a trimmed brisket (not the best way really) 9 hours, and one that only had it's deckle cut off (meaning no top-back really marbled meat) - but all it's other fat still on top - for 11 hours.
By the way, our commercial smokers heat through electric. The smoke-box is ignited with gas. We usually burn one log - something that's been split. So it smokes for a while, and then just cooks for a while. Get a nice smoke ring too.
I wanted to share this because it's been working great for us. And I thought it might be fun to discuss our differences of opinion with temps and time and how much of the cooking is really smoking....
Nancy