Yeah, that's a pretty short administration time for the WISC-IV, though I suppose there may be someone out there who can do it well and that quickly. So, if you didn't get a full score, yet have FSIQ and GAI numbers, and the test took about 15 minutes fewer than usual, I gather they skipped at least a couple of subtests (most likely Symbol Search and Letter-Number Sequencing), and then prorated.

So that makes the difference in scores even less significant.

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