Khan seemed to have no zip on his punches versus Peterson and that's what made Mosley retreat versus Pacquiao. Still his reflexes can't match Khan's and Khan gets a UD on him.
I think Amir Khan has been exposed somewhat. Shane Mosely has the tools to get in Amir's face, rough him up, bully him, and he definately has the power to hurt him. It isn't impossible for a similar outcome to the Lamont Peterson fight. If Shane hurt him he'd stop him. I think Amir, in his fight against Peterson, and also against Marcos Maidana, he seemed to "shoot his bolt" in the first 2-3 rounds, then just held on for the remainded, throwing arm punches and running.