A sunny bank holiday afternoon gave me the opportunity to try out my Leica Summarit 90mm f2.5 lens in a real world situation on the M9. These are from the in-camera jpgs. I used the standard jpg settings which meant everything was set as "flat" as possible. There is no in-camera or post-processing sharpening. Leica M9 jpgs are the closest I've ever got to a "neutral" jpg. When I bring the raw files into either Photoshop or Lightroom and set everything at zero I regard that as close as I can get to what the camera is recording without doing any processing. The in-camera jpgs are very close to that, so they are a good guide to what the camera/lens combination can produce.
The 90mm lens is 6-bit coded which means the camera spots what it is without having to be told.