Well I suppose. I had assumed that was due to the fact that
a) RF is very concerned about security and knows that the NSA has excellent internet intel capacity. So bugger all is kept on internet connected systems.
b) Leaking RF material will buy you 30 years in the gulag, and Russians know this. Personally I would not want to spend 30 years in Siberia so I might be quite careful about leaking materials.
I know I often take a contrarian view to folk on here, but it doesnt seem so odd to me. How much Kingdom of Saudi Arabia material does Wikileaks have? That might serve as a useful control.