Correct, the hotter water will freeze before the cooler water, we did this in chemistry class. The reason we were told is because the reaction of the hot water is cooling down very rapidly, more so then the colder water, this rapid cool down continues and surpasses the colder water so it does freeze first.
Another way to look at it is, we have all seen the videos in winter time of when its very cold out and folks will take boiling water and throw it into the air and it becomes 'snow'. The water has to be be boiling and the quick reaction freezes it. If you were to do this with just regular water it would do nothing.
There is no magic voodoo here, it is just chemistry at work.
