What is becoming apparent is that this camera will require a very different approach to exposure, namely exposing for the highlights and pulling up the shadows in post processing. Leica M's weighted metering does not help. I suspect the images posted here will have been based on that average metering. Other previewers have pointed to the ability to pull up shadows from the raw files.
Furthermore, as noted in this preview photographers will need a set of filters to get the tones right. I suspect these sample shots did not use such filters.
These features will make the camera a challenge to fully exploit. For most photographers the alternatives, such as the D800 or the expected M10, will allow them to attain excellent work with less effort and without a major shift in shooting technique. I, for one, look forward to seeing how this camera will perform "in the right hands".