As someone mentioned directly in this blog post I can tell you where I came from with the event at least. Trust. Making sure developers know what we're working and why we think it's important and when we can show everyone the data to back up our rationale. I think we still have a long way to go, but it's something I've always strived for my team (devrel) to do.
I felt that it was important to ask these questions on the AMA (there was a fair few in the sli.do in other areas around trust) that centered around all the different pieces of work we do but also knowing that we're not the AMP team we can only answer with our perspective - we try to do everything in the open and developers should rightly judge us on how well we do. I do encourage people to check out the blink process as a place to keep a check on what we are thinking about.