A [small edit](http://data.stackexchange.com/stackoverflow/query/114033/votes-with-non-null-userid) of your query makes it clear:

<!-- language: lang-sql -->

    SELECT COUNT(*)
    FROM Votes
    WHERE VoteTypeId = 2
      AND UserId IS NOT NULL
    
    - 
    0 
      
    (1 row(s) affected)

<sub>This is really just a comment.</sub>