Adam Serwer is unsurprised:
The progression of his views on the subject are really classic Romney: First he's against [an unauthorized incursion into Pakistani territory to get Bin Laden] in principle, then he clarifies that he's only against announcing that he'd do it while basically announcing he'd do it, and now he's saying it's a decision any president would have made. From abortion to health care to immigration to Iraq, Romney's shifting positions on Bin Laden track with his tendency to adopt whatever position is most politically convenient at the time.