I think Medlen's earlier problems were a result of anxiety. Obviously, this past start was outstanding, but he retired the last 11 batters in his previous start.
Obviously, I'm not suggesting that he has "figured it out", but he's very smart. He's gonna learn from his early mistakes, so I expect him to improve with each outing. He has struggled early at every level but gets progressively better.
Unfortunately, Glavine is coming along. Hanson will be called up soon. Hudson will also be back. I only see one more start from Medein before the inevitable move to the bullpen.