Sorry for not being clear. I completely agree that Opera's experience is relevant and useful. They have done some great work on optimizing mobile web performance and it would be fantastic to draw on that expertise to make open standards which everyone can benefit from. However, don't forget that SPDY and related technologies create a problem for Opera, which is based on a closed protocol and ecosystem. Personally, I believe in an open web based on open technologies which can be implemented by anyone. Without releasing code or a spec, it's easy to take a position that your approach is better - since nobody can scrutinize you to prove otherwise.