I'd say getting an offer from Google means nothing, but successfully working there for a few years at level 5 or above, does count for something. If you are recruiting for a startup, as my wife's recently did, the difference between the Xooglers she hired and non-Xooglers in terms of productivity and code quality was large.

This would likewise apply to seasoned ex-Facebook, Twitter, Square, Amazon, etc engineers. These are likely people who had to work with teams on reliable complex systems that serve a big audience. It won't matter for the prototype you use to get seed funding, but I'd argue it matters for the eventual rewrite.