Tom Wolfe

Fortunately, the world is full of people with information compulsion who want to tell you their stories. They want to tell you things that you don't know. They're some of the greatest allies that any writer has.

I can well imagine that certain writers, even writers that we'd consider today very great writers, may not necessarily have tested highly on IQ just because of their numerical skills, or maybe they may not be very good at memory, and are not particularly good at these kinds of tests.