NEW YORK (AdAge.com) -- Arbitron's commercialization of its Portable People Meter system in New York and New Jersey radio markets this week triggered a flurry of conflict. The attorneys general of both states filed suit to block implementation of the system, which, they charge, undercounts African American and Hispanic audiences. Arbitron then counter sued. Meanwhile, the Hispanic Radio Association and the National Association of Black-Owned Broadcasters joined with regional minority radio stations on the steps of New York's City Hall to blast the Arbitron system as inaccurate. Arbitron defends the accuracy of its data gathering.