There's been a lot of meta-quizzing going on lately -- pjammer made his own online-quiz-quiz, and jnanacandra linked to one more recently.
I will note that think the higher prevalence of online quiz-links in the statistics is partly due to the fact that the quizzes have a unique URL. Other information (news, especially) has many sources. And the quizzes provide those helpful links, or people put them in because quiz results, unlike other commentaries, aren't that useful without a link to the quiz.
One final note: the relevant LJ stats page is here.
P.S. Don't cross the memes!