When a developer is focusing on performance this is generally a good sign, because it basically means that the groundwork is done.
On his way he also rewrote occlusion queries. The following commit line shows his intention:
This fixes flickering in Enemy Territory: Quake Wars. The driver now renders everything correctly in this game and the graphics is awesome.
I'll most likely grab myself a copy of the Enemy Territory: Quake Wars demo and test his latest achievements.