What are the criteria for calling someone a high or low capacity? Some Buddhist teachers and writings I have seen differentiate between (students of) “high capacity” and “low(er) capacity”. As far as I’ve understood, some of the criteria for saying that some people are of “high capacity” is intelligence and morality. It also seems to me that you actually have to have heard about the Dharma to be of “high capacity”. 

Can someone give explicit criteria for what “high capacity” and “low(er) capacity” actually means? Or a reference to an explanation?
EDIT: coming back to the notes of some Buddhist lectures I attended, I did find some references!


Low Capacity: remains a "faith follower" for a long time. Does not really understand the explanations, but follows the teacher with enthusiasm and determination. Usually has good but rather superficial morals. Requires much study over a long time, to imbue clear in-depth understanding of Buddhist principle-and-function.
Medium Capacity: remains a "dharma follower" for a long time. Has thorough intellectual understanding, but no true insight into the principle-and-function of Buddhism. Because of this, has one's theoretical constructs disconnected from one's daily life. Requires lots and lots of practice over long period of time, to cleanse the blockages and overcome habits.
High Capacity: gets the point with little to no explanations just by watching the teacher in action. Has capacity for intuitive grasp of the Truth.