Hot water freezes faster than cold?

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The discussion centers on the phenomenon where hot water freezes faster than cold water, known as the Mpemba effect. Participants express skepticism about the validity of this effect in closed containers, suggesting that evaporation in open containers contributes to the observed faster freezing of hot water. The conversation highlights a need for clarity regarding the mechanisms behind this phenomenon, with references to a mathematical explanation that attempts to elucidate the underlying physics. The vague nature of the proposed explanations raises questions about their applicability in controlled environments, prompting further inquiry into the conditions that influence freezing rates.
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http://www.iflscience.com/chemistry/hot-water-freezes-faster-cold-and-now-we-know-why

I thought that this had never been shown to happen with closed containers. I always thought that this was an issue of open containers allowing for evaporation and hence a smaller amount of frozen water, and that if lids were put on then the cold froze faster.

Does anyone have any thoughts on the vague explanation proposed in this link?
 
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