I was hyperlexic when I was younger, and I'm female with AS. I don't listen to a lot of that stat talk - in most cases, females are under-reported anyhow. I'm still technically hyperlexic but I don't have as strong of traits - I'm more balanced now. I also had eidetic memory, although now that I'm in my mid-30's it's not as sharp as it used to be. Pity.
Anyhow, being hyperlexic doesn't mean you can read fast. It is how you read - it's a very shallow, concrete sort of comprehension that allows for very fast memorization, but that doesn't mean the hyperlexic understand what he or she has read. By the time I was 7 I could list numerous countries, states and provinces, horse, cat and dog breed, different types of airplanes and jets, the system of animal classification and all the bones and major muscles in the human body, just from the books I read. However that doesn't mean I understood all that data. I just could regurgitate. As I grew and developed better comprehension and critical thinking skills, my ability to memorize large amounts of data from reading lessen, but at least what I read I actually understood.
As for my reading speed, it really depends on what I'm reading. If I'm not reading for comprehension, I can speed read pretty fast, anywhere from 200 to 400 pages per hour. Of course, as it was pointed out, speed reading isn't exactly thorough reading. I read the "gist" of paragraphs when I speed read. I have a very refined, even intuitive sense of what is and isn't important, I follow my own grammatical and syntaxical "pointer" system for clues of what's important. So I mainly read what is important and gloss, even skip over the rest. If I enjoy a writer's style, and want to read more thoroughly, then I read slower, maybe 60-90 pages a hour.
If I read for comprehension if depends on how familiar I am with the topic and how difficult the subject or writing is. Dense, efficient writing that jams a lot info into a few sentences, or writing that uses a lot of difficult jargon or techincal words requires slower reading. History texts I can usually read at a good pace, about 60 pages a hour. Science or medical texts a little slower - 30-40 at the most. Philosophy and theology is probably the hardest, because you don't have to just comprehend, but you have to critically think about what you've read to truly understand it. So I often stop preiodically and reflect when reading those kinds of texts. My reading pace comes to crawl when reading most phil or theo - 10-20 pages an hour. Hell, I've spend over an hour dwelling on a single paragraph at times.