One example of the discrepancy: In late September,
Nielsen rated the sitcom "Two and a Half Men" as the fifth-most-popular show on TV. Online, however, Networked says the show was No. 1, with over 65 million interactions.
This information is just a "piece of the puzzle that advertisers didn't quantify before," something important to an advertiser that wants a show's cool to rub off on its brand, says John Lowell, SMG media buyer. "But Nielsen data is still going to be valuable."