Most investors think because a YC Partner invested, that must be the best company. And the YC Partners should know, they've spent the last three months with every company!
I'm sure the YC Partners' track record of "picking" is no better than SV Angel, a16z, Greylock, etc.
I think this tweak to the investment policy will contribute to eliminating the sub-par angel investors who base a majority of their investments on which companies received funding from YC partners. PG taking action to make his dreams a reality [1]