The most important aspect of JustTinkering's post is that he provided complete data (boil time, water volume, starting water temperature). I wish more people would do that because without complete data, there's no way to assess stove performance.
I calculated the performance of his stove:
It put 274 watts (936 btu/h) to the pot. Unfortunately, that isn't all that good. A pressurized jet soda can stove, and even just a soda can with some fiberglass insulation stuffed in it typically will deliver about 325 watts. JT's stove is about 55% efficient (assumed 50/50 ethanol, methanol) which is OK.
That said, it's a neat design and maybe with some refinement, would make a good project for tool deprived stove makers.