I've been to Egypt before and would normally list as many others would - routine risk on a par different than America, but not frightening.

That being said, I think that you made the correct choice. Right now, this summer, is not a good time to be in Cairo. With regrets I share this horrific article about 91 confirmed rapes in Cairo in the last 4 days alone:
http://www.hrw.org/news/2013/07/03/e...exual-violence