The more people sharing your button sends signals the search engine that your content is relevant and worth sharing to others

Another one for the shame file

Good article but for the statements below:

"The more people sharing your button sends signals the search engine that your content is relevant and worth sharing to others. This gives your authorship a boost in the search engine calculations.
The use of the Google +1 helps your search engine ranking as well. Google announced upon the launching of the Google Plus that they will be using the Google +1 button as a social signal for website ranking on the search engine and will likely to be used on search quality in the long term. Each time someone clicks on your Google +1 button it adds to your credit on the search rank that adds more relevance and credibility to your website."