http://www.techradar.com/reviews/cameras-and-camcorders/cameras/digital-slrs-hybrids/pentax-q-1005997/review
Bundle of sample pictures, real-world or not and including this ISO set, are available in full size and being un-retouched.
A good and detailed review after all. But I am afraid that whilst the P-Q's higher ISO performance at 400 to 800 seems to be acceptable, all the images viewed at pixel level are still, SOFT, no matter how and for what! :-(
N.B. Most of the test pictures were made with the "01" kit prime.