Mechanical optical stablization does not help with shutter lag. It helps if the camera is moving during the shot, but it does not compensate for the delay between when you wanted to take the shot and when your smartphone actually took the shot, which can result in the shot being missed, or the shot being blurry because the subject started moving.

Right, I somehow managed to misread that post. Yeah, that happens fairly often on the 1020 (not so much on 808 I think).