University websites are a great place to study how large sprawling organizations with tons of content handle things. In this case the change in navigation design is largely from the wide horizontal nav structure with drop-down sub elements to the iPhone screen sized nav pattern of just skipping the user down to a site map like experience. In websites like these there’s often 3 or 4 different navigation clusters happening on the same page, it’s confusing. It’s also extremely hard to plan during the architecture phase of a project like this. I commend the creators of this site for approaching a responsive design solution and giving us the different experiences we get on the various screen sizes.