60+ is playable, but I notice a significant increase in smoothness and responsiveness around 80 FPS (of course this is assuming good frametimes which are even more important).
This really... it's the low spikes that make it janky rather than the average FPS.
Low spikes of say 50fps I can cope with, but if you are hiting lower FPS then you need to turn the graphics settings down a bit for a smoother experience.