Hmmm... I don't know anything about speedreading or photoreading, but I'm a natural fast reader I guess. When I was a teenager, I used to read one novel every evening.
I had never consciously thought about subvocalizing or not, but now that you mention it, yes I don't subvocalize when I read. I don't even hear the words as a voice in my head. I don't know if it's good or bad, but I can assure you that I understand what I read
I also don't subvocalize when I think. It would slow me down, as I can think much faster than I can speak. As a result I often don't know which logical path I followed to reach the conclusion I reached.
Tip: to read fast, don't focus on the words. Don't look at them one by one. Just pick one point in the middle of each line (or if they're broad pick two points on each line), look with relatively unfocused eyes at this point and "soak" the information in unconsciously. Jump from point to point with your eyes, don't follow the lines.
My 2 cts
