I've worked in ranking myself and seen how the debates go from the inside. I would not take a conclusion like this at face value, no. If they had included some data, maybe.

What you would likely have to do to determine this as an outsider is sample a number of people, ask them for opinions on stuff, look at their feeds. See if certain opinions are overrepresented. Look at correlation between opinions they have and opinions they see while you are at it.