Aaaaaaaaaah thank you. Frame rate was 60 because "limit frame rate" was set to "vsync". I've set it to "Off" and FPS is now around 150 to 250 with max graphics quality on a 3840x2160 display and lag is now imperceptible. That's with OpenGL, slightly lower using Vulkan.
Just for interest, this is on an Alienware R3 via Wine on Linux (OpenSUSE Tumbleweed)
Now much closer to the feel and behaviour of the real-life counterparts. Thank you.
Another question now... (new thread)