It's great that your kids are capable. And by all means write a book. But the way they have titled and publicised it tells me they want to "methodize" (yeah I made up my own word there!) the process.
And while I do believe that many many kids out there could be finishing school earlier than the regular 18, I don't think that every child in the world would be ready by 12.
I think they are forgetting that not every child has a more capable academic ability (or interest). And while they may stress the focus of allowing kids to find their own passions, many many more parents will assume that they need to push harder when their kids are not making the grade.
