I can quickly identify some potential issues with statistical controls and low numbers of samples, but a dismissal based on credentials is a weak logical fallacy called credentialism. I see it everywhere, especially on forums of people who are likely to have and value credentials (HN). The authors' credentials (which are really not lacking anyway) have nothing to do with the merits of their argument. Especially on an internet forum, where there is no shortage of people with free time to analyze arguments.