Both of my kids had larger gaps in the WMI subtests. My DS had a digit span of 18 and picture span of 10, and my DD (dx with ADHD) had a digit span of 7 and a picture span of 16. I'm not sure how uncommon it is for kids to have strong preferences in auditory vs. visual processing. FWIW, these preferences are reflected in their classroom performance as well.
My DD had the opposite fortune with having her higher scores counted in the FSIQ. Her highest scores were in Information, Visual Puzzles, and Picture span, none of which counted for FSIQ. If we had been allowed to substitute the 16 in picture span for the 7 in digit span, her FSIQ would have been so much higher.
