"Not" being a partner in PRISM doesn't mean much; it just means you're legally obligated to handle that paperwork by hand. Like every other company in the country, you're still required to comply with a valid 702 directive.
“We have never heard of PRISM. We do not provide any government agency with direct access to our servers, and any government agency requesting customer data must get a court order,” stated Apple spokesperson Steve Dowling.
http://www.cheatsheet.com/technology/is-apple-lying-about-it...
Other investigative reporters have worked out what PRISM was. Now we're all pretty sure we know. But that doesn't mean the tech companies at the time had any clue. It is somewhat unlikely that the thing that sent them 702 directives was, to them, referred to as "PRISM".
Generally, I find, when PRISM gets introduced into a discussion about Internet privacy, the discussion gets rapidly dumber. I'm not saying that's happening here, but it's a risk. If you're going to talk about it, you should have better sourcing than whatever the hell "The Cheat Sheet" is.