I'm kinda skeptical about the quiz, honestly. A lot of it seems pretty simplified, and I didn't do the "how important is this to you" part, since it didn't seem to require it and I couldn't be arsed to really grade my responses. So, yeah, take it all with a massive heaping of salt.
From the responses I did give, though, it nailed me at 100% Roman Catholic. Though it also told me I was 96% Eastern Orthodox Christianity, which tells me the quiz sees into my soul and knows of my secret shameful Catholic boner for Byzantine history.
The next few entries were just the flavors of Protestantism and Orthodox Quakerism. Apparently I skew more towards the Jews than the Muslims (no surprise, the evil shekel-hoarders corrupted me early by being kind and intelligent friends, the bastards). And my very bottom value is New Age, with 16%.