I just set aside about 15 minutes and worked through this article. By base words per minutes was 315. When I finished 15 minutes later it is now at 795 wpm. If you have a ton of reading you have to do, I suggest investing the time and going after this.
Of particular note is what Ferriss says at the end:
If used for study, it is recommended that you not read 3 assignments in the time it would take you to read one, but rather, read the assignment 3 times for exposure and recall improvement, depending on relevancy to testing.