I agree that in the context of an explicit “how soon” question, the colloquial use of fast/slow often means sooner/later. In contexts where you care about actual speed, like you’re trying to get an ice cream cake to a party and you don’t want it to melt, it’s totally reasonable to say “well, the train is faster than driving, but driving would get me there at 2pm and the train wouldn’t get me there until 5pm”. I think takeoff speed is more like the ice cream cake thing than the flight to NY thing.
That said, I think you’re right that if there’s a discussion about timelines in a “how soon” context, then someone starts talking about fast vs slow takeoff, I can totally see how someone would get confused when “fast” doesn’t mean “soon”. So I think you’ve updated me toward the terminology being bad.
I agree that in the context of an explicit “how soon” question, the colloquial use of fast/slow often means sooner/later. In contexts where you care about actual speed, like you’re trying to get an ice cream cake to a party and you don’t want it to melt, it’s totally reasonable to say “well, the train is faster than driving, but driving would get me there at 2pm and the train wouldn’t get me there until 5pm”. I think takeoff speed is more like the ice cream cake thing than the flight to NY thing.
That said, I think you’re right that if there’s a discussion about timelines in a “how soon” context, then someone starts talking about fast vs slow takeoff, I can totally see how someone would get confused when “fast” doesn’t mean “soon”. So I think you’ve updated me toward the terminology being bad.