What's your motion-to-photon latency?

Hey!

It is 21ms in the Store for me. In Oculus Dreamdeck, the motion-to-photon-latency is around 20-23ms, with lots of headroom (70 % on GTX1070).

On reddit, several people seem to have around 20ms: 
https://www.reddit.com/r/oculus/comments/55avya/high_motiontophoton_latency_how_to_find_the_cause/

I found a test with the dk2 (vr Campfire in opensim) and there they are also mention 24ms for the motion-to-photon-latency:
https://blog.inf.ed.ac.uk/atate/2016/07/20/vr-campfire-in-opensim/

I guess, that getting around 20-25ms for motion-to-photon-latency is acceptable, but an official statement would be great on achievable or even typical latency values.