Your original claim -- the one in that's still the headline of the linked HN post -- is that the NSA admitted it listens to phone calls without a warrant. I don't want to get into a linguistics debate, but I think this has indeed been refuted. It's certainly unsubstantiated. I mean, that's why you changed the headline of your article on CNet, right?

For the rest, I don't see how it's possible to prove the negative: that the NSA isn't doing what you claim in your piece... but if the only evidence they are is second-hand from what Rep. Nadler says he heard in a secret hearing... and now he says he was wrong... Well, seems awfully weak to me.