FiveThirtyEight says that despite predictions of a record Republican turnout, it looks like the 2012 New Hampshire primary brought out far fewer voters than the 2008 primary. They're projecting 185,000 votes this time compared to 240,000 votes four years ago. And it gets worse:
The drop-off in turnout looks worse for Republicans since a higher fraction of voters - about half this year, compared to 37 percent in 2008 - are independents. That means that turnout among registered Republicans could alone be off by nearly 40 percent from 2008.