Hi, Elizabeth: I don't think there's much doubt that there's a link between ACEs and PTSD. Many people actually prefer to call it CTSD (chronic traumatic stress disorder). And I prefer to call it a normal reaction to toxic stress caused by ACEs, and not a disorder at all. The toxic stress (allostatic load) research that Dr. Bruce McEwen and others have done are pretty clear on how the physiology works. And the links to the research listed in my previous comment show how military personnel and veterans with high ACE scores have higher incidence of PTSD than those with lower scores. Bessel van der Kolk's book, The Body Keeps the Score might be a useful resource, too.
With most of that room not knowing about ACEs, you have great opportunities ahead of you to do some useful education!
Cheers, Jane