Howard Berg claims to be the world's fastest reader at 25,000 words a minute (Guinness, 1990). The average person reads 200. Basically, he'd have finished reading this paragraph by the time you got to the word fastest... But don't despair, you can get better with practice.
Using YiBook, for example. It's an excellent app to download e-books from your favorite sources via WiFi or iTunes. Add bookmarks, highlight information and time how long it takes you to read a novel. YiBook drops from 5.49₺ to 1.79₺!