Do we put too much emphasis on "torture tests"?
but we have to keep in mind that this is only true if they're kept clean enough for their exposed parts to move.
This is true of ALL machinery, big and small, revolver, auto, truck or tank. If the moving parts are frozen, they are no longer moving parts.
Consider the moving parts of a handgun are generally one or two large parts and a couple of smaller ones. In a revolver, the cylinder (obviously) and pawl, bolt, hammer and trigger are about it. In an auto, you have hammer and trigger (or striker & trigger), disconnector, slide, barrel (tilt barrel design service autos), magazine follower, cartridges, and depending on design, maybe a link, or a safety lever, mag catch, and slide stop.
Excpet for the slide, these parts don't need to move much, but they do need to be free to move, or some part of the operation fails.
Now, we all want absolutely reliable handguns, under all concievable conditions, but really, how many of us, how often put our guns (and our selves) through the kind of stuff done in these torture tests? It has become a very popular thing, and when your favorite "wins" one of these "tests" it becomes "proof" of the superiority of your favorite gun, right?
But every gun and ammo combination has individual quirks, and just because gun ser#xxxxxxx passed the test, it is no guarantee that your "identical" gun will. Maybe a better than fair indication, but no guarantee.
When it comes to extreme cold, things behave differently than they do in temperate climes. Metal get brittle (and this includes springs!). Oil turns to sludge, and grease to a rock. During the Second World War, the Germans learned the hard way a lot of things the Russians already knew about keeping machinery running in the extreme cold. Running with no lube is better than running with the wrong lube.
A lot of those lessons still apply today. And we have specially designed lubes for ultra cold temps now days, as well. The one natural lube that could be counted on in ultra cold is no longer something you can get on the market. Whale oil doesn't care about low temps, but for some time now it's more important to keep it in the whales than on the market.
One big thing to remember is that if your handgun is exposed for hours, and reaches ambient temp, it can break when fired. We are talking extreme, lows here (-20F and below), Something very important to the military, but of less concern to most civilians. We tend to keep our handguns warmer that a private on the line can keep his rifle or machine gun.
So, discuss, argue, bicker, even, butg at the end of the day, if it is frozen, it won't work as planned, no matter what it is.