First of all, please try to avoid all about criteria and methodology issue. 
I’ve seen that Avast does a good ranking in VirusP test and this also make me surprise why some AVs that mainly focus on ITW malware ( may be they not but I think they are ) do a poor results with ( almost ) overall malware. This issue related to overall protection for a user ?
http://www.virus.gr/english/fullxml/default.asp?id=62&mnu=62
I believe that Avast can give us the best against ITW malware according to ICSA Labs’s test and give us a good ( and getting better ) about other malware especially in trojan scene.
http://www.icsalabs.com/html/communities/antivirus/labs.shtml