Can you explain how is that a weak argument? What is the job of a MARKETING REPRESENTATIVE OF A COMPANY? To Market the product? So how can you trust a Marketing Department to provide a valid review I don't see any stronger argument against validity of the test when the tests themselves are performed by the company and especially by their marketing department. The only stronger argument I might see if the TDSS authors did the tests themselves and picked the worst performing products as #1 in order to provide misinformation. And yes of course a review site will somtimes not rate their product as #1 in order not to "Seem bias" and to provide a sense of "objectivity" whereupon still mantaining credibility and alligence to the people WHO PAY THEIR BILLS. edit: I am not saying that KAV is bad, I use it myself on one of my systems. What I am saying is that no one should base their purchasing decision on the tests performaned on that site.