Fair point about your comment, I'm just trying to make my point based on the original generalization I replied to: Part of it is simply wrong even for the US (s

Fair point about your comment, I'm just trying to make my point based on the original generalization I replied to: Part of it is simply wrong even for the US (see siblings), and the rest cannot stand as a generalization for the rest of the world, which "any statistics about students" doesn't account for.