I’d expect them to be above-average within the reference class of “cabals attempting to overthrow the established political order”, not the reference class of “people in general” or “organizations in general”. And I’d expect the average rationality level of that first category to be pretty low.
See http://lesswrong.com/lw/1ko/on_the_power_of_intelligence_and_rationality/1d5t . If rationality is an important factor in success, you’d expect pretty much all of the successful groups to have above average rationality.
I’d expect them to be above-average within the reference class of “cabals attempting to overthrow the established political order”, not the reference class of “people in general” or “organizations in general”. And I’d expect the average rationality level of that first category to be pretty low.