> I'll bet a hand-pumped Coleman fuel stove would beat the pressurized stoves for both weight/fuel volume and heat output in sub-freezing environments.
very possible - but that's not necessarily the main advantage. Guys like Messner carried butane/propane burners up the 8000m peaks in the 70s and 80s already, and they should be worried even more about temps than me. I know they do drop pressure when they cool down, so you may have to heat them up in the bag before cooking.
The real benefit of liquid fuel is the light container for fuel, but it will take a lot of days to make up for the weight of the stove - still - cold weather performance and if you cook a lot to melt water and you may have enough reason to go liquid:
http://www.thru-hiker.com/articles/stoveweight_vs_time_14days.php
