So there is a lot of sites with speed reading helper tips.
One thing is the trick of presenting words of a text really fast to discourage inner voicing of the words.
So I basicly thought figlet. Hum … that should be doable and came up with:
for i in `cat read.txt | sed 's/ /n/g'`; do clear; figlet -c -w 115 -f big $i; sleep 0.3 ; done
-w 115 is the width of the active window (for center justification calculation).