Mark Blumenthal, the “Mystery Pollster,” writing at Pollster.com, implies several things about SurveyUSA’s Pollster Report Cards that I will address here:
Blumenthal wonders if SurveyUSA uses in its 2008 Pollster Report Cards a measure of poll error that may be cherry-picked to favor SurveyUSA. Blumenthal wonders if SurveyUSA results might be less accurate, compared to other […]

38 polling firms have polled one or more of the 36 Presidential Primaries and Caucuses to date in 2008. Here’s how the pollsters stack-up, ranked from smallest average error to largest average error (where smaller error is better, and zero is perfect).

Complete supporting detail, and caveats, on the jump …

SurveyUSA polled in 18 separate election contests on Super Tuesday. In 8 of the contests, SurveyUSA was the most accurate pollster. In 2 more contests, SurveyUSA was tied for most accurate. Contests where SurveyUSA polling was best:

1
 
California Democratic Primary
KABC-TV, KPIX-TV, KGTV-TV, KFSN-TV

2
 
Connecticut Democratic Primary
WTNH-TV, WABC-TV

3
 
New York Democratic Primary (tie)
WABC-TV, WGRZ-TV, WHEC-TV, WNYT-TV

4
 
New Jersey GOP Primary […]