> 12-15K feet just isn’t that high in the scheme of things. Many peaks in the western US are in that range or more.
It's "not that high", but people frequently do get AMS at those attitudes or even lower.
It's "not that high", but people frequently do get AMS at those attitudes or even lower.
I'm not sure what point you're trying to make. People regularly experience AMS at the heights far below what OP mentioned, whether on the day they arrive or on days 2-4, and that's not even accounting for strenuous physical activity.