After searching the web for similar experiments, to my surprise I found quite a lot of blog, forum comments claiming that this extraordinary method is a kind of panacea to successful data recovery. They say that in any way it won’t get worse since your hard drive is already dead :)
They also say that before putting hard drive in the freezer it is better to put it into something like ziplock or plastic bag to prevent condensation. One of the blog commentators wrote that when he removed his hard drive from the freezer it was completely covered with ice and when it had slightly melted it still worked.
Some of the users developed the topic even further by trying to suggest the best ways of connecting hard drive without removing it from freezer. Good luck folks!