Last week, I was one of 35 marketing professionals invited to the San Francisco Videonomics event up high on the 32nd floor of the Westin Sf. Francis. There were microphones at every seat, a nice touch that made the session a true collaborative summit and made every attendee part of the conversation.

Nielsen presented and shared how it was deriving their new version of digital GRPs. The speaker made the point that big budget marketers were "the customer"when it came to buying media and that's why it was necessary to have a digital GRP. 

If you're familiar with this argument, you'll think it obvious that there was quite a bit of disagreement from the crowd. 

Nielsen has a point, however...