Facilitation is a form of education that differs from teaching / instructing in so far as the student is encouraged to learn for themselves.
In CRM in particular the facilitator helps the crew learn collectively by talking through their flight, interactions and decisions rather than just telling them what they should have learnt.
It's a supportive role, which 'know-it alls' can neither do or learn from - by definition!
Seniority is not necessarily useful in the CRM sense and may be a hinderance.
Another resource:
http://www.amazon.co.uk/Skilled-Faci...e=UTF8&s=books
So if facilitation is not used in other countries - how do they do their debriefs?