Andrea’s comment to me, sotto voce, was that Archer is far ahead of where Jonah was at that age. I felt that was missing the point, apart from being impolitic, especially as Jonah has always impressed everyone with his intelligence, even as a toddler. I reframed her observation thus: Jonah was always the one taking everything in, examining the world, understanding it, recording it, drawing conclusions about it; whereas Archer is the one who lets everything out, exploring his environment more by engaging the people in it.
None of which is to imply that Jonah can’t be outgoing, or that Archer has no interior life. Far from it!