According to Wikipedia, speed reading is
any of several techniques used to improve one's ability to read quickly. Speed reading methods include chunking and minimizing subvocalization.
There are very few articles on how to speed read in a foreign language, e.g.
- Can We Speed Read in Foreign Languages? by Kristjan-Olari Leping (June 2009).
- How to Speed Read in a Foreign Language by James Withers on eHow (now archived in the Internet Archive).
However, what I miss is any data, ideally from studies, about the proficiency level needed for speed reading (assuming that you are familiar with most of the vocabulary in the text you are reading) and how speed reading in a foreign language impacts reading speed.