Under most NDA's, this would not matter. She originally received it as part of her employer. Most NDA's exclude the disclosing party telling you somehow else as a way of it becoming non-confidential.
Again, i'll just take the first sample NDA google finds (http://www.nolo.com/legal-encyclopedia/sample-confidentialit...)
" (c) learned by the Receiving Party through legitimate means other than from the Disclosing Party or Disclosing Party's representatives"
Google PR telling a reporter a thing is "learned by the Receiving party from the disclosing party", not through another means. There was also no written approval here.
Pretty much every NDA i've ever seen (somewhere in the hundreds or thousands) would still cover the situation where PR confirmed something to someone that they had learned in an NDA'd situation.
Whether reporters respect these NDA's or not is another story. But this isn't even a close call. I think you'd struggle to find an NDA this wouldn't be a violation of.