I am wary that these nature versus nurture studies will always find some way in which purchasing or investing in additional or more expensive schooling is key. That is until such time as genetic engineering become consumer available, then I imagine a slew of studies proving that people with x heritable trait succeed. Of course, I'm a father with a 1 and a half year old already in Montesory school because despite my wariness that it's all just marketing pretending at science, I can't not want to give me daughter every advantage I can. They've got me over a barrel!