This is mainly why I'm asking for data from Facebook. I've seen claims that their vcs operations (at least the most common ones) are near instant, but nothing o

This is mainly why I'm asking for data from Facebook. I've seen claims that their vcs operations (at least the most common ones) are near instant, but nothing official. It would appear that FB have solved the responsiveness problem with Mercurial but, again, no official data to back it up.