So what, their solution is a control loop arms race between smart meter designers and freezer designers? Freezing is a fight against thermodynamics, and if the freezer is not maintaining it's own, optimized control over temperature, any delays are like borrowing from the Bank of Carnot. You can always "pay back" the delta T debt, but you'll owe inefficiency compound interest on top of it.
The damned freezer knows 2 things: 1) cold enough? and 2) compressor on?. I completely understand that there are additional factors for the larger picture, but, to co-opt a meme, "freezers gonna freeze" and it's not sane to have them bargain with the smart meter to do their sole function. This will add complexity, cost, and pollution (adding wireless, ARM controller, memory, etc to a freezer introduces many new parts requiring...you guessed it...MORE ELECTRICITY to design, build, ship, and support) to the freezer for a negligible benefit.