Take a look at this user's reputation for March 24, 2011.
He got 12 upvotes in one day, on 12 separate questions (Well above his daily average). The entire collection of votes took only 9 minutes.
That's not even enough time to read and understand all the questions and answers. And, the answers cover a variety of topics.
It sure seems like one single person decided to boost this user, irregardless of the quality of answers.
Is this legit? A sock-puppet?