I'm impressed with Jason's posts. He seems to be methodically working through all the misconceptions of inexperienced founders. This is an important and subtle one. Investors assume that if they're hearing about you first from you, you can't be any good. If you were good, they'd already have heard about you, because you'd have found a way to get introduced to them by someone they trust. Even if investors didn't start…
You wrote,"Even if investors didn't start out with this bias, they'd soon learn it from experience."
Considering the core value proposition, and biggest driver of YC's success is it's introductions it promises... I feel a need to question this second part of your statement purely from a potential bias perspective.
It may be true, but can just as likely be built on a false assumption from anecdotal evidence.