I found this response to the article. I always like to see (or at least try to understand) things from multiple view points and I think the Mary Sue article makes some good points. The author not only seems to take the article a little personally, but as a condemnation against a whole generation, which I didn't sense in the Atlantic article. Overall I think that we have gone overboard in the search to ensure that everyone feels comfortable, but that doesn't mean we can't be considerate. As with most things a balance needs to be found between the two.
One of my friends has PTSD because he saw half a baby hanging from a window in the middle of a warzone. I don't doubt there are a few people who have their own terrible pasts to deal with on college campuses, but I also wonder A) how much we're changing an entire culture to accommodate a small minority and B) by changing the culture how many people are searching for their own moderate trauma to fit into the PTSD culture.