I didn't look at the site in depth, but only the first 3 pages contain software that was reviewed this year, for a fair comparison all products need to be tested and reviewed within the same time span and using the latest possible definition files, as well as tested against the same threats.
Also, it still stands that some of the worst infected computers that I have worked on had Norton installed.
Norton as everybody knows is also one of the only programs that will not let itself be uninstalled easily, often needing the use of a special removal tool from the Norton website. That in itself makes Norton products very similar to malware.
The last computer that I worked on a little while back had Spy Sweeper installed, which was detecting but having trouble removing 6 malware items. I removed Spy Sweeper, installed the free progams that I always use and recommend, and almost 300 malware items were detected and removed.
I checked that the computer was in fact clean at the end using HijackThis, and also posted a HijackThis log on the forum that I moderate, where the Administrator of the site also confirmed that the computer was clean.