Outside of what Alex has said, yes it is true that it may seem like you're going backwards, and yes - it's good training.
But as far as the AT LEAST two hours thing, I'm not so sure. I remember back when I first began I was going at nearly what seems like the same speed as I am now, except the comprehension has increased by about 5 times better, along with all the other unmentioned benefits.
-youngprer
