I have always considered myself pretty average at most everything, and quite below average in some other things!! In our dojo Sensei (a Kokudan) demonstrates what he wants us to do by talking through what he is doing whilst actually doing it, and then does it again two or three times and once more at a pretty good speed. Then he lets us 'loose' and watches us all quite closely (small classes!! Usually no more than about 10 or 12 people!) stopping us individually to give advice and then, IF he spots a lot of people having the same problem, he stops us all and demonstrates again two or three times highlighting the point where he saw a problem.
I find this quite good to learn from because he is allowing all three learning styles to come out in his teaching!!