Jessica Livingston is giving a killer talk. I love her point of view as a non-technical partner at YC and her huge role as a judge of character
EDIT: ... that's not to cast any aspersions on any particular people involved here, I'm just trying to make a general point that "intuition" or "judgment" may not actually be as good as we think they are.
A wild experiment would be to test their judgment system by planting a few charming serial killers in their "character judgment" sample pool. My hypothesis is that the charming serial killers would pass at a higher rate.