Sure, it's superficial, but it's fun, and some of the questions are pretty thoughtful. Give it a shot, and post your results!
Here are mine:
1. Neo-Paganism (100%)
2. Hinduism (82%)
3. Sikhism (79%)
4. New Age (79%)
5. Mahayana Buddhism (74%)
6. Unitarian Universalism (70%)
7. Bahá'í (66%)
8. Liberal Quaker (64%)
9. Reform Judaism (64%)
10. Jainism (63%)
11. Scientology (63%)
12. New Thought (62%)
13. Orthodox Judaism (59%)
14. Christian Science (Church of Christ, Scientist) (48%)
15. Islam (48%)
16. Theravada Buddhism (48%)
17. Taoism (44%)
18. Liberal Protestant (39%)
19. Secular Humanism (37%)
20. Orthodox Quaker (29%)
21. Eastern Orthodox (28%)
22. Latter-day Saint (Mormon) (28%)
23. Roman Catholic (28%)
24. Conservative Protestant (26%)
25. Atheism and Agnosticism (21%)
26. Jehovah's Witness (18%)
27. Seventh Day Adventist (12%)
I suspect that "Jehovah's Witness 18%" accounts for the presence of those annoying people who occasionally show up on our doorstep. "We know that 18% of you is with us--we must only claim the rest for the Watchtower!"