It is a quality website, at least as good if not better than the sites that are in the top spots now. It has decent natural backlinks from all sorts of sites including .edu sites. It is an EMD. I have no idea why it got hit so hard, I have not done any backlinks to it for ages, it as getting them on its own.
Anyways, I just thought I would share that. I know a lot of us have been hit really hard and are looking for any source of info from others.
So the site is on page two today, maybe in the coming weeks it will get back to the spot where it has been for years. I just wanted to post this for those that are thinking all is lost. Hang in there guys. The dust has not settled yet. Your sites may come back.