Actually very interesting pool
I learnt to read with inner voices in my head, as a child I was very ambitious and curious to start reading on my own all the wanderful stories... and I did it! In about a year I was reading children books fluently and on another years I developed high speed of my inner voice, twice as fast as I could physically speak...

Nowadays I cannot read that fast, it seems that I cannot recognize the text at such speed but I am still comfortable with the speed of speach, I like to set 3x normal spead on my player when I am listening to audiobooks or podcasts it helps me better feel the story, seems like my natural perception speed
Somewhere at university time I heard once about the subject. One of my friends went to fast reading classes and he was learning thechinques to not subvocalize so that way the reading was supposed to be faster. I tried that too but could not get it anyhow - without inner voice I do not understand any word only images.
I am curious is there anyone who learnt "fast reading", as they advertise it, thechique of silent reading after initial subvocalizing habbit and uses it from that point?