The vents in our 737 cockpit spit ice particles on our heads on a regular basis as well.
I haven't seen mist forming, if it did then I suspect many collegues would scream 'Rapid Depressurization!' and proceed to put on their Oxygen Masks and establish an emergency descent!
But seriously, the space is probably too big to be able to create the humid conditions one or two warm bodies pilots in a confined space like a fighter cockpit will.