4A’s President-CEO Nancy Hill is no longer scheduled to speak during Advertising Week in New York next week during a session called “Trust Forum: Transparency,” along with members of the Association of National Advertisers. It’s the latest sign that the rift between the agency groups is far from healing.

The multi-part session was to begin with ANA execs, members and representatives from Ebiquity and K2 Intelligence, which did an investigation of media rebates in the U.S. on behalf of the ANA. The second part, “A conversation with Nancy Hill,” promised Ms. Hill would sit down “for a conversation on the 4A’s commitment to taking a leadership role in achieving fairness and transparency in the marketplace.”

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