During our large-scale mobile usability study, we observed that when users land on the homepage of a new mobile site, 70% scrolled up and down nearly the entire mobile homepage, quickly scanning its contents. Most did so to answer questions such as What type of site did I land on? What can I do here? and What should I expect to find?. Yet, our benchmarking reveals that 42% of mobile homepages have a design that risks setting wrong expectations for their users.