If it is as right as it is insightful (which it undeniably is), I would expect those who come across wedifid's explanation to go back and change their vote, resulting in %positive going sharply down.
A quirk (and often a bias) humans have is that we tend to assume that just because a social behavior or human instinct can be explained it must thereby be invalidated. Yet everything can (in principle) be explained and there are still things that are, in fact, noble. My parents' love for myself and my siblings is no less real because I am capable of reasoning about the inclusive fitness of those peers of my anscestors that happened to love their children less.
In this case the explanation given was, roughly speaking "egalitarian instinct + politeness". And personally I have to say that the egalitarian instinct is one of my favorite parts of humanity and one of the traits that I most value in those I prefer to surround myself with (Rah foragers!).
All else being equal the explanation in terms of egalitarian instinct and precedent setting regarding authority use describes (what I consider to be) a positive picture and in itself is no reason to downvote. (The comment deserves to be downvoted for innacuracy as described in different comments but this should be considered separately from the explanation of the reasons for upvoting.)
In terms of evidence I would say that I would not consider mass downvoting of this comment to be (non-trivial) evidence in support of my explanation. Commensurately I don't consider the lack of such downvoting to be much evidence against. As for how much confidence I have in the explanation... well, I am reasonably confident that the egalitarian instinct and politeness are factors but far less confident that they represent a majority of the influence. Even my (mere) map of the social forces at work points to other influences that are at least as strong---and my ability to model and predict a crowd is far from flawless.
The question you ask is a surprisingly complicated one, if looked at closely.
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A list of some posts that are pretty awesome
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Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.