>Google PR confirmed
Confirming confidential information something to someone under NDA doesn't violate the NDA.
>to a reporter
One's occupation has nothing to do with the legality or enforceability of an NDA.
> on record.
This is not a legal term, and has no legal value, but a practice in journalism. A journalist can publish things "off the record," it's fully legal it's just a way to ruin their reputation.
>Once you publicly disclose, the nda makes no sense.
Every serious NDA I've signed (dozens of them) has had a clause which basically says, "Once it becomes public it's no longer covered by this NDA."
However, Google didn't make the information public. They were talking to an employee of a business they have an NDA with (an employee which I'm sure has signed an NDA with Forbes and an agreement to honour all of Forbes' NDAs). Again, it's completely irrelevant that they're a reporter - as it should be. Could you imagine if Bezos/Amazon could violate any NDA they wanted as long as they passed the information onto a Washington Post reporter first? From the perspective of them being an employee of a company under NDA, this is clear as day.