I was agreeing with your sentiment. Upgrade doesn't mean what the guy thinks it should, per apt, one of the most widely-used package managers on the planet.
That said, I do disagree with you now. The language used to describe...uhh..."increasing" minor vs major versions is exactly the kind of thing package-manager-maintainers would get to decide on. What do you think, we're going to have a congress of linguists to determine command line flag names?
the point is, those two words are essentially fungible. regardless of who says they mean what, they are not right, unless their definition is that they are basically synonymous.
