I'm not defending the website. I'm merely irritated that you somehow seem to level your ire at me when I had nothing to do with the study.
Are you engaging in mind reading now? Of course I knew they had a testing methodology. All of these studies use a testing methodology, otherwise the security software makers wouldn't submit their products to be tested. Now the detailed methods might not satisfy your curiosity, but that probably has more to do with your own ignorance of the realities regarding testing thousands of malware samples with nearly two dozen AVs.
And why would I care to substantiate my own claims to you? I'm the OP of this topic, not you, and the topic had nothing to do with substantiating the claims that I made. That's your doing, not mine. I've already satisfied my curiosity, because I'm the one that tested several AVs including webroot and Norton Security and found their performance impact to be unacceptable on my 960 Pro. No amount of argumentation on your end is going to change my mind, because my mind has already been made up.
Also, there's plenty of anecdotal responses from other people in this thread concerning the performance impact, and hassle of running an AV.
