Low turn-out might have something to do with the fact that Tuesday’s contests didn’t actually allocate delegates. Folks as voters may have taken the same attitude toward them that Gingrich as a candidate took toward the one in Missouri: not worth the bother.
I agree that the fact that no delegates were actually allocated had to put a damper on enthusiasm. And I also blame low turnout on the caucus format. Why would I go and sit for a couple hours and listen to people blather on about why they support a certain candidate? One of the networks asked the voters at one of the caucus locations how many of them still had not made up their mind on whom they would vote for. About 2 people out of around 40 said they were still open to changing their minds. So, why do they sit around and give their speeches? It seems to me that after all this time and, and after 19 nationally televised debates, folks ought to, and did know whom they were supporting.