Not that I really have time to discuss this, but a lot of people have made a big deal about the high turnout in Democratic primaries (see here for instance).
The really high turnout in Iowa, New Hampshire, and other early primary states conveys real interest in the election.
High turnout in Hawaii is simply because the primary there has never mattered before. Who is going to turn out to vote after someone has already sewn up the nomination?
Deconvolute that, then Iĺl get excited.