If the idiot allowed the water to evaporate to a point where the volumes differ then its simply like comparing apples and oranges. Of course the water with the lower volume will freeze faster! That is common sense.
I think the idiot did that. But Lets just keep it that it is a mixture of the four events combinded <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />