I think a better question to ask is not if it is relevant, but what portions of it are relevant. There are certainly many key, important lessons that have been learned in the process of scaling their organization and processes. I'd say it's near impossible that none of those lessons are relevant.

Copying their full process probably won't make you the next Google, but figuring out how to take their learnings and apply them at the right time is a great way to give yourself a leg up.