Batman Arkham City - May even be Securom to blame for poor performance.
I don't doubt that for a second. Skyrim click it opens the launcher, press play and the bethesda logo comes up in 3 seconds, then at 15 seconds the menu is up and I can press continue to start my game. Batman AC on the other hand opens the launcher then you press play and 20 seconds for the splash screen to come up, on the desktop, then at 1m17secs to get to the first fullscreen logo video, then at 1m42secs the actual press start comes up. That is way too long, and it is almost guaranteed that it is being caused by the DRM checks. IIRC the DRM that was stripped out of Witcher 2 was causing a 30% degradation of performance, I expect the same thing on Batman AC.