Quote: in the bar charts, the results of Sigma 50/1.4 and DA*55/1.4 for Pentax seem to be the other way round, i.e., with the Sigma having the better results. So, there seems to be some error in the printed material.
The order of the results is not kept, however the presented data seems imho to be consistent:
Table of results:
best / worst / average [%]
Sigma: 90,5 / 38,5 / 67,3
Pentax: 100 / 62,5 / 83,4
Bar charts:
max / min [%]
Pentax: 100 / about 60
Sigma: about 90 / below 40
The last two sentences in the report state that fast primes with aperture 1.4 and fast zooms with aperture 2.8 gave bad results. They indicate that the small DOF obviously played a role.
If I had to review this paper in a scientific context, I would have asked some serious questions and called for changes - at least considering the conclusions. Nevertheless, if I would be within Pentax marketing, I now would proudly claim in all advertisements that (according to this test) the Pentax K-5 has the best AF performance within its DSLR class.
For us Pentaxians it at least shows that under the tested circumstances Pentax is really competitive. Regarding the differences between contrast and phase AF, I may have to overthink my distaste for mirrorless solutions.