I had a summer job once in high school working in the office of a small business that published test preparation books and related products. They had devoted one of their rooms to a speed reading course; one day the teacher told me that as an employee I could take the course at no charge. I said that I could already read as fast as I could think, and he rolled his eyes and said, "You people who think." I believe that this skill might be useful to some people, but I prefer to avoid reading things that could profitably be speed read, because life is too short for that. For example, I haven't read the OA.