I think they only tested the Free Antivirus because AVAST Software wanted too like in the way the Free version is tested by AV-Comparatives.
The main goal is to compare avast! Free antivirus against a bunch of suites and see how it performs.
In my opinion, avast! haves solid results (I have to remember that the version tested is the Free one) with a good average overall. Only need to improve a little nothing on protection..
Now if you think the reverse, feel free to comment but please keep it clean.
Thanks.
*Edit:
Edited avast! version on 1st post (avast! IS to avast! Free).