And re this:

Look at the Mandiant report's map of Chinese cyber intrusions (at least those tied to Unit 61398): Russia is untouched. "That's a huge area. . . . I really would wonder why they're after South Africa, the U.A.E. and Singapore but not Russia.

Does that mean that the Chinese are leaving Russia alone, or that Mandant had no data on actions targeting Russia, or that the Chinese have a completely different unit targeting Russia? I certainly wouldn't assume on that basis alone that the Chinese are not targeting the Russians.