I'm leaning toward "hoax." Lulzsec has been reasonably competent writers so far, and the bizarre placement of "blissfully" makes that either incompetent or some kind of steganography. That, added to the lack of tweet, makes me doubt.
Of course, it could still be some anon who actually does have the census data, and considers himself lulzsec-affiliated.
The writing style does seem different, sentences in this release aren't terminated in some cases, whereas those from officially corroborated releases always are.
Of course, it could still be some anon who actually does have the census data, and considers himself lulzsec-affiliated.