I agree with you, Sarah!
On the other hand, it can't hurt to let people out in the wider world of MobileRead in on what eDGe users know.
One point to discuss here is, why aren't there studies like this using the eDGe? I would like to know what happened with the project in Egypt, for instance. Was it a whole school, or just a classroom that got eDGes for their studies? How did that work out?