Did you do it in the daylight? I have only done it in the dark.
The hen will change her cluck, as the new chicks start moving under her. It will be nearly constant.
As Ridgerunner states - one really cannot say all birds will do .... It does depend on the individual. We are cattle ranchers...
Often times I see people blame the broody hen, but really it needs to be a two way relationship. The chicks need to find that warm spot under her, and she has to have that motion under her to flip the broody hormone to the taking care of chicks hormone.
Pipca is right, if you want her to hatch...