Welcome!
When you express surprise about the VCI and PRI, do you mean that you are surprised that the VCI is this high, or that the PRI is this low?
While waiting for your response, I'll throw out some thoughts:
1. Yes, the high WMI is probably related to the mathy-ness.
2. Sometimes math is what you notice more because language doesn't have the clear benchmarks that math does (other than when you learn to read, and that isn't always a good measure, as I'm sure you've seen from others' accounts).
3. Someday, when the WISC-V reaches your southern shores, you can have her re-assessed, including the new Figure Weights and supplementary Arithmetic subtests, so a Quantitative Reasoning Index can be obtained. You might see more of a difference between verbal and mathematical ability then.
