Anecdotally, I have mentioned PRISM to several non-techie friends over the years and none of them knew what I was talking about, they know 'Snowden' but not 'PRISM'. The amount of people who actually cared about the Snowden leaks is practically a rounding error
Most people don't care about the details. Neither does the media. I've seen national scandals that the media pushed one way disproven during discovery in a legal trial. People only remember headlines, the retractions are never re-published or remembered.
