Nevertheless, AA has improved its yield and unit revenue subtantially more in the first nine months of 2012 than has UA or US, both of which have lagged DL and AA in revenue improvements. When emotions are set aside, AA's revenue performance in the first three quarters of 2012 has been better than anyone expected and is better (relative to the rest of the industry) than AA has performed in several years. UA stumbled big on March 3 with its ill-timed computer conversion to Shares and has yet to fully recover. AA has been able to raise prices and fill more seats more effectively than has Smisek (UA) or Parker (US).