That's great for him, but what I see is that a lot of kids never develop the habit of using pencil and paper, including my own. I had to teach them to use it, when I found out this was the problem. Once they got used to using pencil and paper, they got better at math.

I see it at the college level too. A lot of college students these days are allergic to using pencil and paper, and I'm convinced it's harming their development. Source: I teach at a large state college.