At 4yr9m my DD simply refused to do more of the coding than she wanted to (precisely two of each, correctly, then she was done and would not budge, she did this in half the available time). It did impact the coding subtest score. She had also lost all interest in some other subtests by the time she got up to her actual difficulty level. She still tested HG. However, tested 6 months later on the sb5, which took half the time and went straight in at her level due to the routing questions, she did test over half a standard deviation higher in fsiq (DYS level).
