My experience is from the teachers training side: as part of the University of Buenos Aires, I taught programming classes to high school teachers.
I think that having a computer is much better than not having it. It makes no difference for kids with access to computers, but there are kids that doesn’t have that. For those kids it may do a difference.
My main complain of the “Plan Conectar Igualdad” is about the cost of incompetence. As you mention there is a lot of capable people that wants better education, but when resources are not very well aligned and plans like this are at the risk to die in each economic down turn, I wished a much better approach rather that giving the netbooks and wait for a miracle.