This might also explain why learning a 2nd language is usually harder than the 1st, and why getting rid of, or changing, an accent is so hard. All that time invested in those old neural circuits, better make use of those first.
As for the accent which i have, i don't know yet. I will try to correct it and see how it goes.
If you spent 1 hour a day learning a new language most people would consider you a dedicated language learner, but a child spends almost every waking our in contact with language.
Children also have to keep up with their peers and siblings (and adults after a little while).
If I had unlimited money I'd love to do a research project with adults in full immersion environments similar to what children experience for years at a time with no chance to 'run away' to their native language.