With the research I've done on 2E kids, you are looking for scatter to help "confirm" in a psychologist's friend's opinion of what you "already know". For example, with my kiddo: He's a very bright boy who has ADHD and Anxiety. : )
He also said another way of looking at it with the old CSE model is that it IS evidence of what amounts to a learning disability if you are looking at a significant discrepancy between a WISC and a WIAT, as in my kid's case. However, it means little unless your 2E kid isn't being successful academically. In our case, our DS is still doing well in school so it doesn't help our "case".
I don't think you doubt the IQ score but there was a lot of evidence I found that in particular 2e populations, scatter is much more common, particular when it is large scatter. It did indicate that if you have what you believe to be a 2e child with scatter that you should not necessarily disqualify them from a GT program based on only a FS and that it will be especially important to consider ALL of the indices on their own.