Both are done by measurbators, but one with real-world scenes as the shooting targets and the other with test charts in a "lab":
http://digiphoto.techbang.com/posts/7658-pentax-16-85mm-f35-56-ed-dc-wr?page=1
(Tested with K-3, in Traditional Chinese)
http://www.photozone.de/pentax/903-pentax_1685_3556
(Tested with K-5 II)
The lens model seems to be fairly good. However, it arrives just too late, Canon and Sony had similar models many years ago, when APS-C DSLRs still shined. Nonetheless, I myself feel that the DA17-70 F4 would still be a better lens optically, because of its constant aperture but only a slightly shorter reach. For size and weight wise, the HD 16-85 is not a compact lens anyway.