According to Osho, answer length depends on the seeker's receptivity. To an 'Arjuna-type' (focused, precise) he gives a brief, targeted reply. To a 'Hanuman-type' (confused, unfocused) he brings the whole mountain: a long, encompassing explanation. He gauges how much each person can truly understand; since most are drowsy in awareness, they need extended guidance to be shaken awake, while the alert require only a word.
He speaks briefly to focused people and at length to those who need more help to understand.