This is a really interesting story and I am really suprised that this it the first time it has come.
I dropped out of high school very early in 11th grade for various reasons and got my GED. While I was studying to take the GED I had friends of mine who were still in school or had already graduated helping me and were shocked at how many of the questions they did not know the answers to. (I then went onto college and loved it!, but that is beside the point!)
It kinda goes along those same lines as the book "The Great American Citizenship Quiz." How many people do you know that could actually pass that US Citizenship Test. I don't know for sure that I could.
Just some food for thought.