> It's said that his mom being on the same board as IBM's CEO at the time was a more instrumental factor to his eventual success than his family's wealth, and his own effort of course.

This sounds a lot like "his family's wealth was a more instrumental factor than his family's wealth" since "being on a board" is pretty rarified air. It's not Gates-himself-level wealthy, but what percentile is that? 90th? 95th? 99th?