With an overall score of 82 the Pentax K-5 II (and its predecessor the K-5) are at the same level as the likes of the Canon EOS 5D MKIII, which scored 81. At the time of writing, it is actually eleventh out of ALL current cameras, only trailing behind offerings from Phase One and Nikon, each costing many times as much.
The individual Use Case Scores are equally impressive: Landscape at 14.1EV of dynamic range is the best in class and Sport at 1235 ISO it just pushes the Nikon D7000 into second place in this very competitive category. The Portrait score shows a color depth of 23.8 bits which places it second in class - just, to the Sony SLT Alpha 77.
When a company launches a new model there is usually an expectation that there will be improvements in the performance (a hope that is not always fulfilled), but here it seems that with the same sensor as the K-5 Pentax has settled, quite reasonably, for the same performance and have remained in the lead.