As of right now, the question How much time do you spend writing one page on average? has received zero up-votes and four down-votes.
Number of comments explaining the down-votes? Zero.
Personally, I thought it was a pretty good question; good enough that I gave it its first answer. While no one has yet come up with a flat number to give him, it doesn't mean that others can't learn something from the question and the answers it's received.
The description of voting down says that it should be done for questions that are:
an egregiously sloppy, no-effort-expended post
which I just don't see as the case here. That four independent people thought that—none of whom could be bothered to leave a comment—strikes me as unlikely.
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The big problem, as I see it, is that if you don't explain why you're down-voting, others have to guess—and they may not guess correctly. For instance, my current theory is this particular question is unpopular because it's about tech writing.
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What do you think is actually going on here?