Good conversion metrics info especially related to AngelList. I liked the idea of spacing articles over the course of the round in credible news organizations and industry blogs. I am a little skeptical about "Top tier investors are less focused on social proof". May be that had something to do with the stellar reputation of YC.

A 50% conversion rate is an outstanding result, great work guys - must've been the mother of all pitches!

Great read. Encouraging. 27days is pretty quick from what I have read.