Also, while it's nice that Xavier Niel finances a school that is free, most of the universities and Grandes Ecoles (where many developers graduate from) are also free, and financed with public money. They work great and produce really skilled developers and architects.
The reality is that Xavier Niel didn't do a Grandes Ecoles, he's mostly self-taught. When he started to succeed in the telecom industry other companies, full of alumni from Grandes Ecoles didn't see him with a good eye because he didn't have the pedigree (and didn't hire many of them either). So he has a grudge about the Grandes Ecoles system, and creating a school with private money is kind of a middle finger to them.