Omaha World Herald: Turnout for GOP caucuses expected to top 2008
Over the last four GOP presidential caucuses, turnout has ranged from about 14 percent to 22 percent of registered Republicans. About 20 percent took part in the GOP's 2008 caucuses.
This year, as always, no one knows how many will attend. Estimates range from 13 percent to 23 percent of the state's 613,000 registered Republicans.
Low turnout and the time it takes to vote in caucuses typically benefit the candidates with the most empassioned supporters, such as Rep. Ron Paul of Texas, whose poll numbers show his supporters back him more intensely than do the voters behind former Massachusetts governor and front-runner Mitt Romney.
That enthusiasm, along with the weather, often determine how many voters show up.
http://www.omaha.com/article/20120101/NEWS01/701019889#turnout-for-gop-caucuses-expected-to-top-2008