Seyed. That was an interesint link. It's odd that when they tested Ubuntu, they never tested it with an nvidia vhip, just the Intel chip. That seems rather unfair.
That aside, They only tested Ubuntu, and not any other Linux distribution ... To be fair (and I like Ubuntu), Ubuntu is bloated. Did they turn off compiz before they ran the game? How may other processes were running?
A better test would have been to include an Ubunut machine with an nvidia chip, and then to include maybe 2 ot 3 other ditributions with the same hardware combinations.
Also, something that was not taken into consideration (and I'm not really gamer, so I'm unfamiliar with the games on the list) but what libraries wee being used by those games? What I mean, is that sometimes, game developers who port their games to Linux do so as an after thought, and don't give much thought to the tools that they are using. Perhaps their games were linked against older, less efficient libraries. Maybe they included thier own instead of using "standards".
As mfillpot has already stated, my own experience has bene that things run faster and smoother under Linux than under other OSes.
Here's an idea ... let's bench mark some originaly Linux software that has been ported to toher OSes, too. How well does the Gimp run under windows as compared to Linux, for example?