You can read faster right now. When you understand how does you are read then your
speed will up. Try read two words ones time. Read only interesting texts.
User of magic speed reading program say
I can read a typical 120,000 word novel in two hours, and I sub vocalize
regularly, so I doubt that sub vocalising is the sole problem. More probably is chunking.
I notice I chunk a lot of things, reading a couple of words at a time rather than
a single word at a time. One thing that I do notice myself doing is painting "word
pictures" when reading expository lumps, rather than
sub vocalising the words themselves.