I read this story as the latest effort by the military to squeeze the White House into giving McChrystal what he wants:
One of the exercise's key assumptions is that an increase of 10,000 to 15,000 troops would not in the near future give U.S. commanders the forces they need to take back havens from the Taliban commanders in southern and western Afghanistan, where shadow insurgent governors collect taxes and run court systems based on Islamic sharia law.