Begun, the camera shutter wars have. Ever since Samsung and Google debuted the Galaxy Nexus' zero shutter lag feature, handset makers have been cranking up their camera apps. Sony's Xperia S is a 12MP monster camera with a fast shutter, but the real speed demon here is the HTC One X. In the video below, the only area the One X loses is in not having a dedicated camera button. As a side note, manufacturers, why don't your phones with amazing cameras have dedicated camera buttons?
As you can see in the first tests, the Xperia S beats the HTC One X in the sleep mode test because it can wake directly to the camera app via the dedicated camera button.