Please don't think for one moment that this seems flippant because it is not intended to be but having been through this once before with my ds and seen close friends go through it too ,very few children come out of the tests willing to tell you much about it. Even if you had a child who was able and willing to give you such info you would have to be pretty silly to pass on details that could put potentially put your own dc at a disadvantage. This year I know of 4 dc's taking the tests next weekend..I have already made my excuses ages ago as to why I would be uncontactable from 4pm Thursday until late Saturday afternoon...just in case dd has told me anything I don't want to have to lie !!!
Try not to worry...won't be long and it will be over and we can all breathe again