It doesn't matter what the data is at this point, since it's encrypted, but what it says, to a disinterested observer, is that Snowden is the sort of person who would gladly wield the threat of disseminating classified US information as a way of protecting his own skin. This directly contradicts the falling-on-my-sword, leaving-my-girlfriend-and-highly-paid job martyr/hero positioning he's been going for.

Snowden is coming to light as a complex character, not some altruistic idealist who expects a pardon and a ticker-tape parade. Phrases that come to mind are "David vs. Goliath," "Catch me if you Can," and "John Le Carre." I love it because it's a more interesting story this way.