Espionage and China

This article by the Washington Post makes an interesting read regarding the threat of economic espionage from China and Chinese nationals.

I wonder how much current concern about this topic is grounded in reality versus hysteria. It'd be worth finding out how many cases of corporate espionage involve countries other than China, and how many are perpetrated by U.S. citizens or by non-Chinese foreign nationals. Maybe it seems like there's an epidemic of Chinese espionage simply because those are the stories that sell best.