Yes, I actually wrote a piece about High Sensitivity and the Autism Spectrum (and Aspergers, in particular) a long time ago, but ended up pulling it down because of the constantly fluid nature of how "The Spectrum" keeps getting redefined. Which is a polite way of saying that I got tired of answering messages from annoyed people saying "That's not what we call it, anymore!"

I do believe there's a high degree of overlapping, and because there are so many formal studies being done now, there's constantly a better understanding coming to light.

Perhaps we also have to consider the tendency of modern society to "medicalize" aspects of the human condition that once upon a time were merely considered to be within the frame of "normal experience," rather than a condition.