That is unbelievable!
If the radio broadcast you heard Judi is correct then the average Sun reader is still below par!
One of my sons taught himself to read before he went to school and he became 'disruptive' when the Teacher was making him go back to basics. At their suggestion we went to see a child psychologist. I was not permitted to be in the room while he was being spoken to. At the end I was told my child was Mensa material and he was disruptive as he was bored. A change of school and joining him in Mensa soon resolved the problem.
Unless a child is in the middle band ie not too intelligent or needing extra help, they are not catered for. I wonder how many kids grow up illiterate due to this...