I tested out the mobile website and from my understanding, unless you are in the park, the website will only tell you if fastpasses are available for an attraction or not and not the return times. You & your mobile device must be in the park to see the return times for a particular attraction. It worked that way on my phone just now. No surprise Test Track and Soarin' had no fastpasses available at 4pm, but I couldn't see the return times for Mission Space, since I am not in Epcot right now. If someone goes to the park soon, and has to use the mobile website, please give a review about the return times being accurate and if they are actually availble to you if you are in the park. Or, if you already have used it.