When SurveyUSA asked San Francisco voters about circumcision, in the context of a proposed ballot measure that would have made it against the law to circumcise a newborn, SurveyUSA found that among male respondents, twice as many of those men interviewed on their cell-phones were uncircumcised as those interviewed on their home-phone. SurveyUSA poll released 06/15/11, of 291 city of San Francisco males, 16% of males were cell-phone respondents.

Polls that exclude cell-phone respondents, such as those conducted by many SurveyUSA competitors, risk mis-characterizing public opinion. SurveyUSA estimates that by Election 2012, half of voters age 25 to 34, and one-third of voters age 35 to 44, will not be reachable on a home-phone. Make certain the polls you commission, and the competing polls you analyze, properly account for cell-phone respondents.