http://dc.watch.impress.co.jp/docs/review/newproduct/20121113_572503.html
(in Japanese)
There are some quick full samples which were generated directly out of the camera available.
The K-5II is also compared for some samples. It appears that the K-5IIs is obviously sharper this time.
Besides, the occurrence of false colours and moire patterns with high spatial frequency texture is also checked and demonstrated:-
http://dc.watch.impress.co.jp/img/dcw/docs/572/503/html/107.jpg.html