Originally Posted by emarsh
Do you mean in the primary? What is the benefit of letting it sit on the yeast so long?
I'm going to go out on a limb and say, yes he meant in the primary. I have made 2 imperial stouts and both have sat in the primary for a month. With a gravity so high, it takes a long time for the yeast to eat all that sugar. I've heard some people leaving it there for 2-3 month for higher gravities.