John Doherty pulled adoption rate numbers for Google's +1 social sharing button, along with share stats for Twitter and Facebook, for the Technorati Top 100 Web sites before and after the launch of
Google+ to determine the impact. The adoption rates rose by a significant amount. An interesting bit of information from the data shows the number of sites that have +1s, but do not have the button
implemented on their site, he writes.
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