Even with hard data, two major sample-selection issues would make me hesitate to generalize the YC experience. First, the YC process attracts especially confident and ambitious people -- not representative of all graduates of the same colleges. Second, prestigious college graduates may have found high-fulfillment work or more traditional startup financing before even considering the YC route. So YC may be rigged to attract an A-team of general collegians (smart go-getters still with something to prove) but a B-team of prestigious collegians (those not already swept up by other plentiful opportunities).

Indeed, "Notes from the Front" can be read as a YC recruiting letter to ambitious prospects from less-prestigious academic backgrounds.