Sounds a lot like my ds9- we are still struggling with getting him to take pride I'm his work and NOT RUSH!! No formal testing other than during biofeedback where the Dr administering the test said he has a Ferrari Brain. I think for my ds that when things don't "come to him instantly" that he gets even more frustrated becuase he is very used to doing everything quicky.Handwriting is awful because of it. My ds still prefers me to lay out his clothes- So I can relate- it is still a struggle and he rushes through anything he can. In school all he wants to so is read so he has to do a good job before he is allowed to read in class- which has done a decent job of getting his quality of work elevated- he still finishes before everyone else- so he can read!