Ok, even Nikon can't produce miracles ...
I had a closer look at
All sizes | Images taken with Nokia 808 PureView in Cape Town | Flickr - Photo Sharing!
It is at taken at 10EV (so, not the usual full daylight to start with) and has almost black shadows in the foreground (cf. 1st attachmant at 800px width).
I then boosted the shadows the way almost only a K-5 tolerates
(cf. 2nd attachmant at 800px width).
Of course,with jpg, the exercis eisn't that useful. But in this case, it reveals noticeable horizontal banding. That's a problem better system cameras have as well. But we almost forgot with the gorgeous K-5 sensor quality