• http://www.zimbio.com TonyM

    Would be very interesting to see an analysis of the sites that have the greatest discrepancy between nielsen and comscore… it may reveal biases one way or the other (does one favor older audiences? at work vs at home usage? etc)

    Great article, especially since you also included Quantcast and Compete. Kudos

  • http://www.planetc1.com/ chiropractic

    The difference between 42 million unique visitors and about 9 million unique visitors is quite a gap, even if we are looking at things broadly. I would have suspected large companies like Hulu would have accurate third-party measurement but apparently that’s not the case.

    If we can’t trust the numbers put out by the publishers, and we can’t trust the numbers put out by third-party measurement, who can we trust?