Quantitatively and predictively, no. You can only look at the outcomes from YC-funded companies, see to what extent they beat the curve. Of course, you still

Quantitatively and predictively, no. You can only look at the outcomes from YC-funded companies, see to what extent they beat the curve. Of course, you still have to sort out the potentially higher quality of YC fundees to begin with. It's a hard statistical problem; any takers?