> 1,587 (56%) of the companies completed the course, and, since then, 38 of them have been accepted to the core Y Combinator program In other words, your chance of getting into YC by these means, is about 2%. Still might be worth, just for the information alone though.
I'm guessing that people who apply to Startup School tend to be very early in the founding process, which gives them an a priori lower chance of getting accepted (even though YC is open to super early stage), and then SS raises it.
Also, the kind of people applying to Startup School are probably not the kind of experienced founders whose application looks more promising at the very early stage.