Can You Trust Web Metrics?

Heather Green from Business Week looks into the three major web metrics providers, Alexa, comScore and Hitwise, and reviews what people are saying about what you can and can’t trust in their numbers, in Traffic Statistics Online and the Importance of Triangulating.

Similar issues were raised earlier this week when Technorati’s Dave Sifry shared stats about increase in blogs over the past three months. Others question Dave’s methods: from Kevin Burton and BL Ochman.

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