Brian Fung has doubts:
[T]here may be a way to achieve a rapid drawdown without dramatically downgrading force integrity, and that is to use private security contractors to fill the gap. I wouldn’t be surprised if the idea has been floated privately — contractors already outnumber U.S. troops in Afghanistan, so what’s another 8,000 to 10,000 more? Upping the number of contractors would be an easy and quiet way for the president to end the surge without really ending the surge.
The Dish 