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Re:Facebook Defends Getting Data From Logged-Out Users by pork on Monday September 26, 2011 @09:03PM (#3041376)
Whatever you've read, Facebook likely has a non-trivial push strategy, just like everyone else. Nobody at their HQ is committing directly to the live site.
Re:Facebook Defends Getting Data From Logged-Out Users by cpeterso on Tuesday September 27, 2011 @02:54AM (#3042180)
Facebook's Release Engineering blog says a code change can go from commit to live in less than 60 minutes. Admittedly, they don't say how often they deploy.

https://www.facebook.com/note.php?note_id=59150988919

Re:Facebook Defends Getting Data From Logged-Out Users by lbrandy on Tuesday September 27, 2011 @03:17AM (#3042232)
Code changes are easy at facebook. Messing with domains/cookies/security/static-resources/etc is more than a code change.