Yeah.....Rubio is most likely gonna win here, it's expected that 1/5th to around 40% are expected to early vote, and Rubio is dominating with them. And Rubio tends to get late deciders as well, most Cruz supporters I speak to here are tactically voting for Rubio as well.
I agree that Rubio has a good shot at winning, but I find it hard to believe that he's dominating amongst early voters, since, if I'm not mistaken, the bulk of early voting happened before Romney's speech and Trump's embarrassing debate performance. Keep in mind that the sample of early votes in that poll is just 72 people.