That is crazy!

The older girl is very mature emotionally and socially, but she lacks some technical intelligence and awareness

But, does it matter if she has all the base skills to learn well? Or does it matter if one has all the technical skills at that age, but can't learn much else well? I think having core skills means being able to learn more later, so the potential is higher. Having secondary skills early, might not be able to make up for the lack of core.