I smell fear here, whether it is investor fear or team fear of losing IP and control when(if) they open source the project.
Whatever the issues they are harming the credibility of the platform. I was an evangelist to begin with - a library built in JS that can silence the compiled crowd is a sure feat.
Now I am more of a skeptic. If this is how long it takes to release the codebase, imagine what updates will be like. I know in the newsletter Steve has been trying to appease, but all that it sounds like now to me is a flash of arrogance over owning a toy that no one else can play with, in an "i know you need this, but hang on" kind of way. I know it is not meant in that way, that would be silly.
WebGl is maturing and if they don't push what they have then they will lose the traction they have for sure.
Hopefully they will just release what they have soon and be done with it.