Atheists & Agnostics

And it's less to do with better schools, and more to do with the ability to manipulate the numbers. If a kid is testing low they can be kicked out (through channels, natch) they can pay teachers less, and now still receive public funding. Public schools also get Draconian restrictions placed on them from people benefitting from the privitatization (look at Duvoss) and often only get funding relative to the wealth in the area.

So they seem to perform better, then it's just conformation bias.

This is also in Canada, so these things don't even apply.