Without judgment, I think it's important to point out in that at no point did he admit that Facebook screwed up, nor did he at any point apologize for anything.
Which has the sleazy, downright-asshole assumption that He and He alone knows what's right. It's just us loser Luddites that don't get it. That's not an apology, it's a syrup-dipped middle finger.
What he didn't say is that "too fast" is a risk they willingly take, not a problem they will even try to avoid. Their self-described mantra is "work fast and don't be afraid to break things."
