It's interesting that Catholics are slightly overrepresented on this forum (in comparison to the US in general), while Protestants are very, very underrepresented. (Clearly non-Christians are overrepresented as well, but that's not at all suprising). Do Protestants not use the internet? (I mean this in a sort of toung-in-cheek way, obviously Protestants use the internet)
Protestants identify less with "Protestant" (and more with a particular denomination or just "Christian") than Catholics do with "Catholic", so probably less likely to vote in this sort of poll.
This. Of course, in the OP defense, there are way too many denominations of Protestantism to mention here, so it's easier to say Protestant and let those who select mention themselves what denomination they are actually of. Kind of like I did.
There are actually over 20 different denominations of Catholic as well.