We're A Nielsen Family?

People have questioned for years the validity and methods behind the Nielsen TV ratings, and this certainly make one wonder: I just received a postcard here at work downtown, addressed to "TV Research Home, 312 Elm St." saying:

"It is my pleasure to tell you that your household has been chosen to be a 'Nielsen Family' for a one-week TV survery. In a few days you will recieve a long-distance phone call from us to explain this exciting opportunity. Please be assured that we are not attempting to sell anything to you. Our only purpose is to learn which TV programs you and your household watch during the week of the survey. We will telephone you soon. Thank you." It was from Susan Whiting, President, Nielsen Media Research Inc.

So Nielsen doesn't know that 312 Elm Street is a 25-story office building downtown, and not a TV home. (We may spend long hours here, but I don't think anyone in the building calls this home.) And there are other businesses in this building, not just The Enqurier. I wonder what number they'll call for their follow-up call? If they end up with me, I'll let you know.