Research on speed reading, reading, priming and memory (a selection)
One study on skimming found that skimming a text before going on to reading it, improved comprehension in the majority of cases.
Word recognition is one of the major slowing aspects for most readers. Research suggests that subvocalisation that nemesis of speed readers is slower on unfamiliar words. If you want to speed up reading, build your vocabulary and learn to recognize words faster and naturally you will improve your reading speed. If English is not your first language or if you want to learn another language or anything else try an intelligent flashcards system called Anki which is useful for learning new words, new terms and anything else.
NASA has built subvocalisation detection systems to pick up subvocalisation (the faint nerve impulses that are sent to the muscles when we read), using them to browse the web or potentially even control a spacecraft.