I was disappointed.

The graphics/visualization is breathtaking but what they learned from all of that analysis seems very limited: Apparently, when caregivers discover that a child is learning a word they simplify their use of that word till the child grasps it and then revert back to normal usage once the child can use the word.

It could very well be that their regular usage of the word that the child is learning is unaffected, but in addition they use the word more often in simple sentences around the child, and once the child understand the word revert back to regular usage patterns/frequency. That would explain the results and does not seem that interesting.