Travels With Shiloh attended a recent conference at Fort Leavenworth, the intellectual hub of counterinsurgency doctrine:

While, current U.S. policy states that we'll begin withdrawing our forces in 2011 there was a universal recognition that any real effort to apply COIN in Afghanistan would take a very long time. While the subject wasn't addressed (except for one question at the final Q&A roundtable) my impression was that all of the speakers (British, Canadian and U.S.) were operating under the assumption that forces would be in place well beyond 2011.

I heard no discussion about how to conduct any sort of hand off to the Afghans within 18 months, alterations to COIN theory or doctrine or trains of thought about alternate ways militaries could support/conduct COIN without significant numbers of forces on the ground. I would interpret that to mean that the military has been given the word (explicitly or implicitly) that that 2011 deadline is NOT set in stone. I would, in fact, go further and predict that barring some unforeseen change in the operating environment we will almost definitely have a significant presence in Afghanistan for some time.

(Hat tip: Ricks)