David Martin, Vice President, Primary Research / Sue MacDonald, Research Manager
You’ve probably heard of the Morgan Stanley report that declares “teenagers do not use Twitter,” based on a sample size of one 15 year-old intern named Matthew Robson. Morgan Stanley rightfully disclosed that they do not claim that his study is representational or merits statistical accuracy, so we thought we could provide both with our NetRatings panel of 250,000 U.S. Internet users.
Twitter’s footprint has expanded impressively in the first half of 2009, reaching 10.7 percent of all active Internet users …