Tuxedage and I interpreted this to mean that the AI party couldn't offer things, but could point out real-world consequences beyond their control. Some people on #lesswrong disagreed with the second part.
I interpreted it the same way as #lesswrong. Has anyone tried asking him? He's pretty forthcoming regarding the rules, since they make the success more impressive.
EDIT: I'm having trouble thinking of an emotional attack that could get an AI out of a box, in a short time, especially since the guard and AI are both assumed personas.
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.