I have a couple of thoughts. I do think that it is unfortunate that they phrased it the way they did in regard to her IQ performance. Saying that she earned zero points makes it sound like she bombed the test where I'd actually expect that most kids would earn zero points if the points are awarded based upon how far above the mean the kid is. Just, for instance, looking at a tool like the Iowa Acceleration Scale, which is used for determining if a child is a good candidate for a grade skip, a child gets one point in the IQ arena if his IQ is between one to two standard deviations (SDs) above the mean, which equates to a score from around the 84th percentile to the 97th percentile. If his IQ score runs from the 98th to 99th (2-3 SDs above the mean), he gets two points, and if it is 3+ SDs above the mean (higher than the 99th percentile), he gets 3 points. That leaves a lot of bright kids (well above the 50th percentile) getting zero points, for instance.
I don't know if the "30" they gave you for her memory/recall score is a percentile. If it is and her processing speed was very high, as you indicated, it may not be pulling the full scale number down a huge amount, but probably is pulling it down some. It is possible to figure a full scale IQ using all of the pieces (memory, speed, perceptual/visual spatial skills, and verbal skills). It is also possible to drop the memory and speed tests and figure an alternative score (at least on the WISC) using just the verbal and perceptual scores. I have one child with a low processing speed score, 42nd percentile, but her IQ figured either way only varies by a few points b/c she had a very good working memory score. If both are significantly lower, as is the case with my other child, the difference between the two score configurations may be more dramatic.
Hopefully they will give you the score breakdown so you know what it looks like. As you mention, achievement is not a sure fire sign that the child is gifted but one lower ability score also isn't the be all end all of who the child is. There are certainly bright high achieving kids who are not gifted who get achievement scores like you mention. If you feel there is something more to the picture, I'd do more digging, though.
