[Not sure if this is the appropriate place in the forums for this, but whatever, if it belongs somewhere else, someone please move it.]
Just an observation from using the 'Ask questions' technique last night in the game I'm MCing. (Not AW, incidentally. It's applicable to a wide array of games.) (Also, I don't know that this is going to be some huge revelation to anyone else, but it was definitely a 'eureka' moment for me.)
Asking questions like this inverts a kind of exchange that's common in games.
Normal version goes something like this: Player asks GM a question. GM, having never considered the question before, makes something up on the fly; not letting on that he just pulled this 'fact' out of thin air, GM answers with conviction and authority. In many games, a HUGE number of 'things' in play get generated this way.
Now, in in AW, when the MC asks provocative questions, it's the player who answers, usually coming up with something on the spot. What this means is that the impetus of filling in the world becomes a group thing, rather than being channeled through a single individual.
Also interesting to me was that noone seemed to notice the 'flip', or that they were directly contributing to the creation of setting, story, situation, etc... Maybe because there's already a precedent for the GM to query players - it it's what you're asking that makes a difference in this case.