Here is a quote from the Relativity FAQ at the NRaas site.
"Reducing the relative speed in the mod will increase the real-time length of a sim-minute in game, while leaving the animations that sims perform unaffected. "
The number of "clicks that is the normal time is 39. Setting the speed to 19 will make time pass twice as slow (real time) but since the speed of the animations remain the same sims can do twice as much animation type stuff, such as taking a shower or eating, etc.
I set mine to 25 so that time is running at .68, meaning that real time that passes is about a third longer but taking showers, sleeping, etc takes 2/3rds the amount of "sim time".
