Not a dev, but I can guess how SoG might work.
The animations and framerate seem to scale up to 60 fps so far. Haven't been able to push the game higher than that. If I were to guess (using a calculator and dividing 1,000 by 60), the latency between interacting/movement etc is about 15ms. Of course there are ability movement locking and whatnot which is a different matter, and will change with each ability. Some may have a second or two of delay, others nearly none.
1,000 being in milliseconds, and 1,000 milliseconds = 1 second. 60 frames per second, thus 1,000 % 60.