Frederick and Kimberly Kagan write about a lost decade in Afghanistan. And they mean the next decade, not the last one.
Especially given the reelection of Obama I stand by this 'Know When To Fold 'Em' post from the summer of 2010:
My official editorial position is that if we had Lincoln in the White House, the Afghani equivalent of George Washington in Kabul, and Generals Marshall and Eisenhower peering at maps of Kandahar, we might still lose in Afghanistan. Gen. Petraeus is a great general and a great American, but he is not partnered with Lincoln and Washington.
Conversely, we might be lucky enough to win even without a President committed to victory, but I don't think it is worth the chance. It's too late now, but it would have been better if Obama had never escalated the war.