ADM James Stavridis weighs in at the USNI blog in response to CDR (Ret) John Kuehn's call in Proceedings to "Punch Them in the Nose and Leave" - calling for NATO/ISAF to conduct a fighting withdrawal in the vein of the Soviets' exit from Afghanistan. ADM Stavridis points out ISAF successes and states that a responsible and managed transition is already underway. Most of the commenters seem unconvinced. Make sure to scroll down to see their counters and you'll find some useful links as well.
You'll note several references to prestige or saving face. On this topic, I highly recommend reading Gordon M. Goldstein's Lessons in Disaster: McGeorge Bundy and the Path to War in Vietnam (New York: Holt, 2008).