Short on time right now, so I'll have to come back tomorrow to follow up, but just a quick few comments (teasers, really!) and further questions:

1. Since she ceilinged on VCI, did they also use extended norms?

2. Low Cancellation does mean something. More on that later.

3. Low PSI can be relevant for dyslexia, including stealth/compensated dyslexia.

...pronounced like the long vowel and first letter of the alphabet...