I would be wary reading too much into polled support for OWS. As the movement has no defined goals or means, it's an abstract concept that it's easy to, at least, not be against. Also, for that same reason, it's very easy to construct poll questions that give you the exact response you're looking for (not that it was difficult to begin with).
Also, FWIW, I don't think there's really enough data to say anything meaningful about the impact of re-tweeting on revolutions. Rather, "clicktivism" is often ridiculed for not contributing anything at all towards political means.