You do have some different definitions attitudes to mine which may account for part of it. For example:
> It took me a while to realize the point of the whole exercise of the Mensa list. It’s not to become well-read. That’s a side effect. The point is to lose your smugness. To get knocked off balance by something older, stranger, smarter than you. To stop assuming you know it all.
I would say those are not two different things. If you have not been affected by things that are "older, stranger, smarter than you" you are not well read!