This document summarizes Angela Lee's research on predicting the popularity of top U.S. news sites based on their use of medium-specific features. She analyzed how the top 6 news sites (Yahoo News, MSNBC News, AOL News, ABC News, Washington Post, and USA Today) utilized 5 process gratification features: interactivity, immediacy, multimedia, information availability, and usability. Her findings showed that the top 3 sites used immediacy, multimedia, and information availability features more than the bottom 3 sites. Usage of the 5 features also significantly predicted the sites' popularity. Information availability was the strongest predictor of popularity among the top sites.