Is that an official, Apple-specific policy written down somewhere? That doesn't seem right, and doesn't match other similar companies.

I've known people at Facebook and Microsoft who were working on upcoming not-yet-released products and were free to talk about the products and their roles on them. These people, much like the person we're discussing, worked on upcoming projects which had already been publicly announced.

Of course publicly discussing a confidential project that no one knows about could get someone fired, but that's not the scenario we're talking about.