I took a speed reading class probably 50 years ago but I don't recall much about it. I've always been a slow reader but that never bothered me. Still, being in college reading faster would help so I took the course. I do remember that it did help with textbooks but I don't think I ever used the techniques for anything else.
Now I don't even recall what the techniques were. I read for pleasure and I don't dawdle but I don't rush either. Rushing, getting through it as fast as possible should be reserved for sex.
Barry