MAKING ICE FASTER - Is it true that hot water pine d in a freezer freezes faster than cold water ?

It appears to be true but the reasons given are varied. Here is one explanation: When the container, lets  say, an ice tray, holding the water, is placed on a  surface of frost or ice In the freezer. the higher temperature slightly melts the icy surface on which the tray rests. This improves the contact between the container and the cold surface, and the heat from the water and container is transferred at a faster rate than would have occurred if the water were at a lower temperature. So the temperature of he water falls faster and you obtain ice faster .