Outsiders can tell when contrarians are right by assessing their arguments, once they've decided the contrarians are worth listening to. This in turn can be ascertained through the usual means, such as association with credentialed or otherwise high-status folks. So for instance, you are affiliated with a respectable institution, Bostrom with an even more respectable institution, and the fact that EY was co-blogging at Overcoming Bias thus implied that if your and Bostrom's arguments were worth listening to, so were his. (This is more or less my own story; and I started reading Overcoming Bias because it appeared on Scott Aaronson's blogroll.)

Hence it seems that Yudkowsky's affiliations are already strong enough to signal competence to those academics interested in the subjects he deals with, in which case we should expect to see detailed, inside-view analyses from insiders who disagree. In the absence of that, we have to conclude that insiders either agree or are simply unaware -- and the latter, if I understand correctly, is a problem whose solution falls more under the responsibility of people like Vassar rather than Yudkowsky.