The time when the article was "put" on the net says May 2011. Probably it was written earlier and "passing" some editorial and so on.
We are not counting yet the probability of some advertisement or promotion (or whatever).
It's like the "in vivo" and "in vitro" studies in medicine and/or biology. Results reflected in an "in vitro" (outside the body, in a test tube or dish or anything else) may not necessarily be the same as "in vivo" (on the body itself). e.g. an antibiotic yielding very good results on a microorganism "in vitro" might give much lower expected result when administered to the patient or a lab animal.
So take it with a grain of salt...
A99 + a7rII + Sony, Zeiss, Minolta, Rokinon and M42 lensesFlickr