My house is circa 1920. There were a few places where they did some weird things when they were hanging the lathe, but the stud spacing was pretty standard otherwise.

It didn't matter; We ripped 6 inches of plaster around the walls and ran new wiring to replace the knob and tube it came with, and dropped cat 5 and rg59 to every room. So there's new plaster in every room of my house.