Great info!

I use the Trangia burner exclusively, so my results are somewhat different. The Trangia is hard to light when extremely cold, but it lights. It is easier to light a 90% full burner than a 90% empty one. And I have to touch the fuel with the match. The Trangia takes a long time to get to full-output in the extreme cold - maybe 5 minutes or so. So boil times are about 50% longer.

I hate Bic lighters when it is cold and I'm not fond of them when it is warm.