I have worked in some of the biggest multinational companies. Every single thing they do when releasing a product is stage managed to put out the exact narrative they want. Their timeline of revealing information is totally plotted out to get maximum effect, reach and traction. The last thing they ever want is the narrative to get away from them. If it does there is basically emergency meetings to try and work out how they respond. One thing I can guarantee you is that when the Github leaks came out there would have been emails, phone calls, Skype sessions with everyone of any importance about what happened, who did it, and how do they deal with it. AMD would be putting together an incident report into how it got on to Github, and Sony would be sending please explains to AMD. There might even be financial penalties for AMD if their company leaks information. It would be a breach of Sony's NDA with AMD.
Trust me, this was big.
You've worked in some of these companies in what capacity?
In what way is the 'narrative' getting away from Sony?
Why are you not bothering to engage with anyone's actual points being raised about Sony's general approach to PR?
Speaking as someone who worked in marketing for several of the worlds largest companies, and who has extensive experience in liaising with their PR companies, while there will have been emails and probably a meeting to discuss the github leaks, knowing Sony's approach to their PR - which is 'we talk when we want to talk, we don't respond to rumours' - their silence over this is entirely what I would expect, and says nothing about the validity of the Github in any way, shape or form.
Also - I would take issue with your claim that product releases require an iron fist on controlling narrative. That may have been true prior to the rise of social media, but these days its a largely impossible dream, especially in the pre-reveal phase where we are now.
Sony's real crisis will be losing control of the narrative
after they've done the full announcement/reveal etc the way it did MS after TVTVTV, because MS didn't just have to roll back their messaging, they had to rework the console OS.