This is often a difficult statistic for programmers who do read to grasp because the only programmers you likely know are more people like you. The thing is, there aren't as many of us as we think there are.

None of the programmers I know don't read. I am told that these people exist; they work in cubicles and so forth. However, I don't know any of them. So, personally, it takes a lot of concentrated effort on my part to not take that 5-10% and bump it to, say, 50%. Because in the world I live in, that statistic is crazy low.

- From Peopleware, Productive Projects and Teams by Tom De Marco and Timothy Lister (2nd Ed, page 12)