The tor guys have said that the development of tor was funded by the US government in every presentation I've ever seen them give.
And the vulnerabilities they mention are not attacks on Tor. The Freedom Hosting attack targeted an old version of Firefox that shipped with old versions of the Tor browser bundle, and only affected users who ignored the browser bundle telling them they needed to upgrade. If the NSA is actually a global passive observer, Tor won't protect you from them, because it isn't designed to protect against a global passive observer. They're open about that too. I get the impression the author read the start of some threads from the Tor or liberationtech mailing lists last year, and didn't bother to read the rest of the threads.