Older isn't the right word, the mortals who went in, Rose, they'll come out the same age. Physically. But their perceptions of time will be different. From their perspective it will have been decades in the darkest pit of Hell. It won't be like the rack, the point isn't to break them and turn them into demons like me. The Cage is supposed to be eternal. So, what will come back out might not be who went in. Mentally speaking. You don't go into Hell and come out the same person.