Note that 28% are "unchurched" and 29% are registered to vote. So yes, I think these are people who identify themselves as Jehovah's Witnesses, but the organization would not. This is a full third of the respondents! This is good news on many levels. It could mean that the religion does not "stick" to all children. Or to the studies.
Downscale adults (i.e., those with below-average levels of education and household income) are almost twice as likely as upscale individuals (i.e., those with above-average levels of education and income) to be active in an alternative form of church.
http://www.barna.org/FlexPage.aspx?Page=BarnaUpdateNarrow&BarnaUpdateID=202
Regarding conservative views, I think generally Witnesses are more vulnerable to quack cures. Both from a macro, social point of view and in their personal lives. They still are quite anti-establishment.
Shocking to whom? Do they not know this about JWs?
I bet Barna didn't.
I think it is sad that there are so many unmarried Witness folks. I think it is lack of selection and opportunity, mostly.