According to Nielsen New Media Research, the average American Idol participant voted via text message 38 times in April 2008.  Women tend to vote via text with greater frequency than men: in April 2008, female voters of American Idol submitted 44% more text message votes than their male counterparts. 

Voting by text is only available to AT&T subscribers. The information was sourced from Nielsen Mobile, who tracks text message voting and contest behavior through its panel of 43,000 U.S. wireless lines.