The Guardian summarizes:
Rich Skrenta, co-founder and CEO of Topix.net, is fed up with hearing low numbers for Google's market share when he reckons the real number is around 70%.
Let's start by agreeing that Rich is measuring something different: search referrals, rather than searches. However, referrals is actually a more important number, in reflecting successful searches rather than failed ones. (Who cares how many searches people run if they don't click on any of the results?) [Google's true search market share is 70% from Guardian Unlimited: Technology]Details of the analysis are at Skrentablog. I liked his concluding comment:
To paraphrase an old industry saying about IBM .... Google's not the competition, Google's the environment. [Google's true search market share is 70% (Skrentablog)]