On September 26, Google told participants at its 15th anniversary event it had a new algorithm impacting more than 90 percent of searches worldwide. They called it “Hummingbird.” Google’s Amit Singhal later said it was perhaps the largest change to the algorithm since he joined the company back in 2001. This information made some marketers nervous, but at PubCon last week, Google’s Matt Cutts reminded the audience that the algorithm had been up and running for more than a month before it was announced, and no one even noticed.