I don't know what to say about the article, aside from Windows vs Linux comparisons almost always have a degree of inaccuracy. In this case, Phoronix are clearly Linux experts and I fully trust their Linux data.

Its very difficult to find someone who knows how to optimally compare Windows vs Linux, because most people only really learn one platform. I've taken it upon myself to become a "jack" in both platforms (having neither the expertise of a Windows expert, nor a Linux expert), so I'm better positioned than most to see and understand cross-platform issues.

But very few people bother to learn both systems. (And frankly, most people don't have to learn the other system, so why bother learning? You really can make a solid career on one OS without ever thinking about the other one...)