Well I am working on my first pork butt, following Elder Ward's guidance. It's only a little over 3.5 lbs. so I thought an easy 5-6 hour cook but I am now at 4.5 hrs. with a temp of 160 F and an egg temp of 250ish(I am not that good yet at holding steady).
Since I haven't went through the "plateau" yet I am betting on another 3 hours or so which would put me at well over 7 hours cooking time.
Will update later for all you that are late nighters in the USA, 1 pm here in Thailand.