They haven't made any numerical claim. The argument against biased data is a fundamental one. Arguing that someone's methodology is wrong is not arguing that the opposite of the conclusion is true. They are just saying "Facebook research don't count". I don't know what statistical evidence you need for "Facebook research don't count".

I've only responded to you twice. Once to tell you that a biased sample set provides garbage data, and again to tell you I wouldn't be arguing with someone who didn't understand the core concepts of the conversation.

The vibes thing is quite the projection, though.