Uh...did you notice that those were all "paid" products. avast enters the "free" version for av-comparitives.org.
On av-comparitives.org avast always score high. Beating even some of the "paid" products. Till they do their testing don't worry about what others have to say. West Coast Labs is another good testing outfit. Both of these are highly regarded. 
a kid from another forum came to me and said that avast! isnt a good antivirus (he uses NOD32 which on igster test found 0/15 malwares and avast missed only 3!)
the reason he said that was because he got pissed on me for laughing at nod32 because it was a failure in that test, so i told him that he's wrong and gave him
proves. so he showed me this site and said that this site is famous and he knows it very good and avast got a bad place (yeah right he just googled it!)..
anyway, i gave him a link to an av comparison which shows that avast! got the best result with 98.5% virus detection and it wasnt enough for him and then he started to curse haha.
but 1 thing was still in my mind, although i feel bad for him and i know that avast! rule and nod32 isn't what it used to be, how is it possible that av comparison sites
claim on their top 10 av that vipre, avg and webroot (wtf?) are better than avast! (which gets to be only 11..?!) this is a total lie and i dont understand why does avast team
doesn't sue them for their lies.
oh and this is from the av comparison site:
Summary:
Overall, the new 6.0 version of Avast Pro Antivirus is a great choice, and it is certainly one of the best antivirus software applications available. The antivirus software is not only one of the most effective, but also one of the most efficient. We’re glad they didn’t mess with the sleek user interface, and we are excited about the innovative new features like WebRep and SafeZone. And while we would have liked to see a few more features and better malware removal, we can definitely recommend Avast Pro Antivirus as a serious contender among the best antivirus software. http://anti-virus-software-review.toptenreviews.com/avast-review.html