Could you please elaborate the point you are trying to make?
Most people don't usually make these kinds of elaborate things up. Prior probability for that hypothesis is low, even if it might be higher for Tuxedage than it would be for an average person. People do actually try the AI box experiment, and we had a big thread about people potentially volunteering to do it a while back, so prior information suggests that LWers do want to participate in these experiments. Since extraordinary claims are extraordinary evidence (within limits), Tuxedage telling this story is good enough evidence that it really happened.
But o...
Update 2013-09-05.
I have since played two more AI box experiments after this one, winning both.
Update 2013-12-30:
I have lost two more AI box experiments, and won two more. Current Record is 3 Wins, 3 Losses.