Ah - glad to see you're reading this in the right spirit, EssexMonk
And for the others, I suppose I'd better come clean and say that some of my comments may have been slightly tongue in cheek. Although having said that, I also believe that there is an underlying truth behind them!
You're absolutely right about Bics, which is why I always carry several in sub-zero temps, and in a warm place so that it'll work! But I'll also carry petrol lighters - my preference is for Imco, and some matches too. And meths, and a pocket wood stove - again my preference is for the ultralight Emberlit Ti, and preferably a multifuel stove or two as well. As you can gather, I'm not trying to climb K2 in a dash either
Quinzys only 6" thick? Rather you than me! However, I will dispute you re the "cold tent" issue. I mentioned Jervens bags before, and the reason is that its a lot warmer than a quinzy - for a good example of that see the following from a man with no arms and a huge sweat problem re his trip to the North Pole...
http://www.jerven.com/reference-from-the-south-pole
Also a good article re the independent testing of the bags
http://www.jerven.com/the-sintef-review