In addition to the above, the obvious question to ask is why the determination is going to take so long - what additional information needs to be collected, what process needs to be followed, what the bottleneck is, etc. I think that the time lag is the bigger question right now. It certainly doesn't take that long to score/get results from any test that I'm aware of.
Unless the external rubrics you mentioned were actual, well-known broadly accepted IQ tests, I doubt they will have much weight. Nor is a test 4 years old likely to have much influence.
We weren't in the situation in terms of a delay, but our school did seem to go out of their way to find the one result of the 4-5 different tests to keep DD6 out of the gifted program. We had to pay for an independent SB5 test which got her admitted. As she's now DYS/SET/etc, I've provided feedback that their screening process might need to be tuned a bit.
