No argument from me there. That is ice cubes 101. But the colder the zone the more likely a freeze & thaw cycle.
.... except when they are not. Many of the Chinese bonsai pots, though constructed to near mathematical perfection, and fired to exactitude will not hold up to our cycle based solely on the clay body itself. I have used a few for target practice. Also true for many hand made planters built by some our finest local professional potters who's usual fair is not planters but platters, and who treat the absorption factors with little regard.
There is really not a certifiable point of comparison here, our climates are apples and oranges. My pottery is made to withstand my climate and harsher climates, and absorption rate is an important factor. It doesn't matter that many of my pots have ended up in California, as some of them also end up in New England.
Good discussion.