Nope
Electronic stud finders changed all that. They give you an amazingly accurate view into the wall and show you exactly where each stud is. In a way, these stud finders are like a touch switch on a touch-sensitive lamp. They are using changes in capacitance to sense where the stud is.
When the plate inside the stud finder is over wall board, it will sense one dielectric constant (sort of like an insulating value); but when it is over a stud, the dielectric constant is different. It works on a capacitance differential generated by density difference. The circuit in the stud finder can sense the change and reports it on its display. The second patent below shows you exactly how to build this sort of stud finder.
The latest technology in stud finders uses a very small radar system to detect the stud.