Portrays this as a matter of opinion, when if any single opinion should be considered it should be Paul Graham's since he was the person performing the act.

Opinion is one thing. But PG's story of "we asked him to choose and he chose OAI" doesn't gel with the -actual evidence- that Altman proposed making himself the Chairman of YC, then went ahead and actually announced it on YC, and then it was hastily deleted and he "chose" OAI.