Yes the older the egg is ,the higher it will set in the water. Also another trick to tell boiled eggs from non boiled is to lay it on its side and give it a spin. A boiled egg will spin and a non boiled egg will not.Is it true that an egg gone bad will float in water? I've tried to find out on my own but I've never had one float yet and they all tasted fine even after up to a month and even a little more past expiration. These are store bought 'cause the city don't like farm animals. That may be racist or something...