[1] http://www.washingtonpost.com/blogs/erik-wemple/wp/2013/06/1...
[1] http://www.washingtonpost.com/blogs/erik-wemple/wp/2013/06/1...
So you're basing your skepticism on what? That he used the word salary instead of income? That's why he has lost all credibility? Not to mention this personal detail has nothing to do with the actual allegations.
Congratulations, you swallowed this textbook hit piece hook, line and sinker. Its entire purpose was to make people "skeptical", of course, and it obviously worked.
However, a variety of people over the years (Drake & others) have also remarked on the over-the-top surveillance. It's also true that the NSA has admitted certain of Greenwald's accusations. So at least in principle, Greenwald has been confirmed.
[1] http://thedailybanter.com/2013/06/nsa-story-falling-apart-un...
[2] http://www.dailykos.com/story/2013/03/08/1192256/-The-Final-...
Of course, it would be nice if Congress forcibly opened the archives and let the truth out into open air - then we could see clearly and make educated decisions! Until then, we have to rely on the somewhat foggy environment of leaks, whistleblowing, and journalists.