I've always thought it a bit of a truism that kids and often adults avoid eye contact when guilty or in a high emotional state. My personal experience is in the hyper range of things. I tend to look away from someone in a heavy emotional state for fear of being overwhelmed by it. Conversely I'd worry about projecting my own emotions onto someone else and not look at them.

Looking at what Temple Grandin describes, it is a completely different experience between her picking up patchwork details and my being overwhelmed by saturated holistic information. If they lead to the same diagnosis, the problem is the diagnosis in the same way it is with how hyperlexia was broken out above.