The answers weren't especially good. But then neither were the questions.Link to full text of Raja's Q&A.
https://www.reddit.com/r/Amd/comments/6bklro/we_are_radeon_technologies_group_at_amd_and_were/
Ultimately I'm not surprised that Raja stuck to the corporate messaging here (least Legal lynch him). It's a hard line to walk in not promising that RX Vega will be out in H1, while at the same time keeping potential customers fully interested and engaged in the eventual launch. Just like in relationships, no one likes to come second.