That is only enforceable for Trade Secrets -- at least in most of the US. Google would need to prove that the things this employee worked on were "essential to the commercial viability of the business".

I totally understand not wanting to poke the legal behemoth, however.

As an anecdotal, a personal friend who is a former Googler signed a 10-year NDA, and he had his fingers in quite a few pies.

So maybe in 3 more years?