It teaches / trains eye to more quickly and smoothly over the page, or maybe it should be said it de-trains the eye form moving the most people's eye do while reading.
At 900+ wpm Alexk eyes have to be moving pretty smoothly and swiftly. The rest the people in the world can benefit from it. It's just a computer visual aid to one of the elements of speed reading.
If you rapid read enough, you'll be getting about the same thing. People should remember that dipping is supposed to be rapid reading, not traditional reading.
Rapid reading is a little disconcerting to most people at first, but so is PRWMS. The fact is with consistant use it come naturally. I've got many many post where I say rapid reading is just speed reading. Dana never agree with me.
Sending love,
Iam22