same here. and not surprisingly, the jet boil boils water the fastest and uses the least amount of fuel.
I performed a side by side analysis of 4 popular stoves, timing bringing 2 cups of water to a boil, and then measuring the fuel used (by weighing) by each stove.
Interestingly, reading the stove label small details at my local REI, most stoves are tested at bringing 1 liter of water, at room temperature, to a boil.
I, for one have rarely (or never?), can't remember?, ever needed to bring more than about 2 cups of water to a boil, and....I don't think I've ever found any 'room temperature' water at any campsite.