I'm looking at a Leica R6 body for $390 (but negotiable); when I fire the shutter, at any shutter speed, I get the impression that the camera is hesitating slightly before actually going through the mirror up-shutter open/close - mirror down sequence. Usually, with most cameras I've used (and I've used a lot), there's minimal shutter lag between tripping the shutter and the camera responding. This R6 strikes me as being a bit on the "lazy" side, but I have no other experience with the camera.

Does anyone find that their R6 is like this, or is it more likely this camera has a problem?