> I think it's pretty accurate description of what PRISM and other NSA programs allow NSA to do — that the signals intel agency can spy on content coming through American Internet servers.

The part you quoted is correct, but he didn't claim otherwise. He said that they could not get Americans' data in that manner, which is true. Reread his exchange with Johnson in the article. ("Does the NSA intercept Americans’ cell phone conversations?") In other words, he did not lie.