The tester who had the best rapport with my DD also got the best IQ results with her (no surprise there!), she was also adamant that DD had no quirks what so ever. She really really DOES have quirks. I am grateful to that tester for showing the best my DD can do on a good day, but I don't take her opinion on the rest as gospel - she spend 1hr with my DD, doing entertaining tasks, none of which clearly demonstrate her quirks.