I was over at a big facility this morning in one of their grading rooms setting up a Sony BVM-E250 OLED display for grading (the usual - rec.709 80Cd/m2 - BBC-style) and as even the monitor was only a bit out; If I didn't have the probe out and ready I might not have bothered!
However, they also wanted me to see if I could match an LG-55EC9300 55" OLED tele. It was one of those new jobs that has a subtly curved screen. I'm convinced that's just for strengthening as the panel is so thin there is no way it could be mechanically stable if it wasn't build on a curved sub-frame!
Anyhow - that model only has the domestic-type tweaks; you can turn ClearPixelTM and SmoothMotionTM (or whatever they call those horrors!) on/off but no colour-balance in the blacks and so I spent a while changing the "warm" and "dynamic" setting to get a consistent 709'ish balance between the blacks and whites and thought that on test signals and real pictures it looked pretty close; a tad magenta in the dark-areas and I couldn't quite get the saturation to match exactly on all material, but if the two monitors weren't next to each other you wouldn't be able to remember the differences.
Here are the settings (if they're useful?)
Picture Mode: Expert1
OLED Light: 60
H/V Sharpness/Tint: 0
Dynamic Contrast/Edge/Colour filter/Expert Pattern: Off
Colour Temperature: Warm2
Method: 20 points
Colour Management System (Saturation, Tint, Luminance)
Red:0, 0, 3
Green: 0, 0, -5
Blue: 0, 0, 5
Cyan: 5, 9, 1
Magenta: 0, 0, 3
Yellow: 10, 1, 2
Noise Reduction/MPEG/Real Cinema/ Motion Eye care/TruMotion: Off
Black Level: Low