You misunderstood me or didn't read the second part of my post. I don't think many 6 year olds will score more than 50% - those that do will be exceptional.
Between a third and a quarter of the questions are ridiculously hard and frankly it's stupid to be trying to teach 6 year olds about fronted adverbials.
The rest are probably within the grasp of a bright and well taught child under ideal conditions but that doesn't mean that even the brightest or most well-taught would actually score in that region given the exam conditions and the poor attention span of a typical y2.
Gove is an arse.