I hadn't started homebrewing last summer when I went on the tour, so my memory might be a bit fuzzy because some of the terms were just jargon to me at the time, but I'm pretty sure they said exactly that on the SN tour.
Of course, if you're nitpicky, you could say it's "can-conditioned", but calling the cans "bottle-conditioned" is just an appropriation of a recognized term to simplify things so they can say their beer is all bottle-conditioned.
If I made a high-gravity, unhopped wort, put it in mason jars, and pressure-cooked them for however long, wouldn't you say I "canned" my starter wort, even though I put it in jars instead of cans?
You could argue that "canning" is a term for preserving foods in small containers by way of subjecting the sealed packaging to heat and/or pressure, regardless of the actual container. SN could argue that "bottle-conditioning" is a term for carbonating packaged beer by way of a controlled secondary fermentation in the package, regardless of the package.
