Most people who self-identfy as YECs don't have a clue what all the implications are. Even the most prolific creationists, like Faith, have to conveniently ignore most of the implications.
That's part of why I cannot accept that they actually believe it. Sure, you can easily check a box in a poll and say you believe something, but that's a lot different that actually committing to it and accepting it as an thought-out truth (and bringing along with it the necessary implications).
It doesn't take much introspection to realize that an actual belief in YEC is ridiculous and unacceptable. But that's more than people are doing when they take a poll and go: "Hey, I like my beliefs on God, I'll check this box".
That's why I can't accept the results of a poll like this as actually representing anything that people have thought through and come to a belief in. It tells us more about the kind of knee-jerk reactions people will have when proposed an alternative to something they are uncomfortable with (or that they'll just choose the God option regardless of the ramifications).
People will say anything, but that doesn't mean they actually believe it.