Probably because he led with "That's slightly annoying." At a quick glance, it looks like he's annoyed that Facebook is doing well (which would just be petty a

Probably because he led with "That's slightly annoying." At a quick glance, it looks like he's annoyed that Facebook is doing well (which would just be petty and deserving of a downvote) as opposed to annoyed with himself for holding an incorrect belief so strongly.