Just as a point of clarification, Facebook has an incredible existing product design team, but the last year's new hires/acquisitions have yet to prove if all the new blood adds up to the best, e.g. just because you hire a bunch of amazing individual designers, it doesn't mean they're automatically and amazing team.
That said, I have a lot of faith in their culture that they will become so; team-building is just never a given.
That said, I have a lot of faith in their culture that they will become so; team-building is just never a given.