The Novels (especially the first one) show the Jagers as being a good deal sharper than they let on (starting with the leader of Klaus' bodyguard coming up with an off-the-cuff way of circumventing his order not to follow them while chasing Agatha's clank, going all the way through to the fight with the wasps at the end. Dimo and Jenka (and to a letter extent Oggie and Maxim) are sgown as a bit sharper due to having been detached.
Novels again: A footnote indicates that the education was a side-effect from Klaus just wanting the kids out of his hair, but gave rise to a more well-educated and enlightened ruling caste than previously.