Even with Kilobytes of change you can get impressive performance increases. But, given that we hadn't any news of a performance oriented patch, its unlikely any big "perceptible" performance gains. Its easier to wait a changelog or find someone to test before/after (i don't know if you can "unpatch" steam games). This discussion is pointless... I'm only here adding to the pointlessness because i have nothing to do until steam finishes downloading Red Orchestra 2 beta...