As stated, it strikes me as unlikely, but something similar seems plausible.

People who have been trained consistently, and can rely on each other to behave in accordance with that training, find it easier to coordinate bottom-up. (Especially, as you say, in guerrilla situations.)

It's not precisely "we all independently agree" but "we each have a pretty good intuition about what everyone else will do, and can take that prediction into account when deciding what to do."

64 such people might independently decide that what's necessary is to surround a target, realize the other 63 will likely conclude the same thing, select a position on the resulting circle unlikely to be over-selected (if all 64 are starting from the same spot, they can each flip a coin three times to pick an octant and then smooth out any clumpiness when they get there; if they are evenly distributed to start with they can pick the spot nearest to them, etc.), and move there.

This is a recurring theme in Dorsai... the soldiers share a very specific and comprehensive training that allows for this kind of coordinated spontaneity. Of course, this is all fictional evidence, but something like this ought to be true in real life. The question is under what circumstances this sort of self-organization does better than centralized strategic planning.

As the OP uses the term, at least, the Dorsai are more rational than their opponents, even though they might not describe themselves that way. We know this, because they consistently make choices that let them win.