I need to be as far from a crowd as feasible and few things are as disturbing as trying to move within the same space as multiple others moving. For me it partially relates to having a poor sense of space due to limited depth perception. My son also has some problems with navigating or tracking when lots of things are moving in a larger space. It is also about the distracting small sounds of other people.
I find idiosyncratic visual things fixating and sometimes overwhelmingly distracting. And once you gain an intense focus on particular detail, it is hard to not keep getting drawn to it and the idea of it. I haven't experienced it with other people eating, but it isn't hard at all for me to imagine that.
So, from my frame of reference, then, both of those could be easily explained from cranked up senses (overexcitabilities, if you will.) That she is aware and adapts sounds resilient and likely a non-issue.
