[janwh]

They do. Durham Goode (Tech Lead on Source Control at Facebook) just held a talk at Git-Merge about how they scaled Mercurial at Fb. They seem to be quite happy with it, albeit applying quite a few restrictions on their internal users that are not really transferable to the general (outside-corporate) usage of VCS (for example only rebases are allowed, directly committing to master all the time, etc.)

[durin42]

That's actually pretty comparable to how we tend to operate the Mercurial project, FYI. We tend to prefer rebase to merge for feature work.

[krallja]

Do you use Changeset Evolution?

[askushner]

Very small fraction of FB engineers use Changeset Evolution.

We have new workflows based on some of the underpinnings of Evolution, but without the UI confusion.