Sure, but there are sizeable numbers of both Orthodox and Protestant Christians, and AFAICR they have relatively little in common that Catholics don't also share.
Agreed, and LW seems to be especially big in countries where Protestantism is more common than Catholicism (US, Canada, Northern Europe). Protestant background might actually be larger in absolute numbers than Catholic.
I have finally gotten the survey to a point where I'm pretty happy with it. I have no big changes I want to make this year. But as is the tradition, please take a week to discuss what minor changes you want to the survey (within the limits of what Google Docs and finite time can do) and I will try to comply. In particular, we can continue the tradition that any question you request can be added to the Extra Credit section unless it's illegal or horribly offensive.
You can find last year's survey results here and you can find the very preliminary version of this year's survey (so far exactly the same as last year's) here.
EDIT: I don't particularly like the IQ test or the Big Five test used last year. If you have any better replacements for either, tell me and I'll put them in.
EDIT2: CFAR, you added seven questions last year. Let me know what you want to do with those this year. Keep them? Remove them? Replace them?