Surely you have enough information in the article to make up your own mind !
Given that AVG (AKA Avast) are one of those listed.
Only 23 apps had a 100 percent success rate with all malware samples. A few more were over 99 percent effective. Most of the big names in malware research and protection were near the top including AVG, ESET, Kaspersky, McAfee, and Sophos.
So where is this claim Avast mobile is worthless (a word search on that page doesn't even find avast) ?
Or are they guilty by omission ?