Whenever you see a name assigned to any bug on Launchpad, it means someone is working on that.
We are lucky to have Tim and as always, it is a pleasure to work with super nice developer like him who does communicate with his team, answers emails himself, etc. Trust me, he is doing the right thing and trust me again other communities don't have that at all.
Ubuntu GNOME QA Team has been founded to make life easier for our developers. If we managed to gain the skills and experiences to actually fix bugs? that is the best of the best for sure. However, for now, we need to do the most basic task of this team, that is testing :)