I don’t know for certain, but the fact that they are on a blue background might mitigate fringing slightly. To me, those characters are too good looking for having no AA

OLED subpixel layout causing chromatic fringing has been known for years, and needs to be fixed at the OS-level.

It all has to do with how the OS handles anti-aliasing of text. With no AA, text looks blocky and unpleasant to look at, but effective AA makes it smooth and attractive. The process responsible for this AA treatment is called ClearType in Windows, and other OS’s have their own processes. However, it works best with the common LCD subpixel layout as seen above, and is calibrated for this structure. It looks strange on OLEDs. You will need a software fix to address it; maybe Valve will include something similar.