Hi Pinky -
Your daughter is gifted. The overall WISC scores are not to be used for giftedness because the PRI scores tend to be around average in gifted people. There isn't anything wrong with her. You can use the scores to get a "gifted index" type of score, ask your tester to do that for you.
Remember that IMHO, test scores never can say how high IQ a kid is, they can just give a botton limit to her possible "real IQ." Ok, i haven't said that well, but I think it's true. As you pointed out, if she is slow and careful (traits we want in school settings) she isn't going to shine on timed tests.
Now here's the big question. Has the tester given you any insight as to why she is failing the "developmental readiness screenings?"
Best Wishes,
Trinity
