I'm not really familiar with the WISC subtests (my 5 yo took the SBV), and I am still new to the whole testing world. It looks like her real (relative) weakness is in processing speed (that is the "PS", right?). This is also my son's area of weakness (his results are in the post "Testing interpretation" below -- the SBV doesn't have a lot of timed components, so it really shows up mostly in his WJ-III scores).
From what I can gather, although I haven't gotten a lot of feedback on DS5's scores, it isn't at all uncommon to have issues with processing speed along with high levels of giftedness. My son also had significant speech delays as a toddler as well. His language is fine now, although he still has articulation problems.
Good luck with everything.
