I've followed OLPC for many years, and can only regard it as a well-intentioned charity with terrible real-world results along any metric you'd care to name. Negroponte is now a name with very negative associations in my mind. What you're reading is marketing for the program.
Did you read anything in particular to come to think that?
Just read this article, which describes a splashy, interesting narrative which jives nicely with my worldview. Which makes me suspicious.
http://dvice.com/archives/2012/10/ethiopian-kids.php
So this sounds really inspiring and stuff, even subtracting some obviously sensational stuff (I assume "hacked Android" means "opened up the preferences dialog and flicked a switch"). I've poked around a bit and found similarly fluffy pop-philanthropy articles. Anyone know if there's more reliable information about this out there?