The Pentax detractors claim bias, which is really just that the article doesn't confirm their own personal bias, the Pentax users, with first hand experience with their K-1s etc say "ya, that's why I chose Pentax."
But as Craig points out, someone who professes to know about AF who has't kept up with the science...
How does Pentax AF-C compare to other brands? - PentaxForums.com
or the Single point AF scores posted on Imaging Resources
should be seriously be questioning the basis of their evaluation. In the world of science "everybody says so" isn't valid, until repeatable testing has taken place. Theories only supported by anecdotal evidence are not worth considering as more than suggestions for research, and over time, it's amazing how many of those "everybody says so" theories were wrong.
One of the most surprising things from those tests, a D7200 doesn't even AF with tracking on. it tracks the movement and predicts the position. It doesn't check focus before releasing the shutter. . So in essence, if there is speed variation by the subject, it will be focussed on where the camera thinks the subject should be, not where it is. For the number fo times i've heard of the D7200 advantage I found that to be rather shocking. It's clear from the research, people are happy when their AF works, and ignore it when their system fails. Regardless of the brand they use. But it's fashionable at the moment to repete "pentax AF sucks." You can certainly tell who is swayed by public opinion.
However, the issue with MSRP is that it's not really open to debate. Pentax comes out on top. People who hate Pentax are upset. There's going to be fallout. Exactly why I never listen to anecdotal evidence if i can find some science on the matter.