During a lesson, she showed us some baby bumps (small and not steep at all) that only allowed 3-4 turns before you were through them.
A lot of trails also have a groomer on one side, bumps on the other. You can "dip into" the bumps as many turns as you'd like. It's a good way to practice without committing.
@SallyCat -
I do think there's a lot of truth to that quote, which I suspect was coined by Josh Matta, who went by a number of usernames on Epic. I expand it to literally everything in skiing.
* It's not that you can't ski breakable crust; it's that you can't ski, and the breakable crust proves it
* It's not that you can't ski ice; it's that you can't ski, and the ice proves it
* It's not that you can't ski powder; it's that you can't ski, and the powder proves it
* It's not that you can't ski on one ski; it's that you can't ski, and the drill proves it
... etc
@Skisailor is right that it's a particularly harsh formulation - Josh is known for his harsh statements, which he would characterize as simple fact - but I've loved that quote since I first saw it several years ago. It speaks to me. A different way to say it, a kinder way, would be, "If you're struggling with a particular task or terrain in skiing, it's because that task or terrain is exposing a weakness in your skiing technique." But that's a bit less pithy.
I don't know if this is a helpful analogy at all, but there's a programmer joke that goes - "Every program has at least one bug. Therefore, every program can be reduced to one line of code that doesn't work." When you "can't ski X," it demonstrates that you need to "rewrite" the part of your skiing related to X. It's actually a helpful diagnostic.
So, my answer to your original post:
I'm curious as to what veteran skiers make of this; is it essentially true? Or is bump skiing a distinct, or somewhat distinct, skill set? I'm planning to make an effort to learn bump skiing a tiny bit this year. Maybe I should hold off until my overall skills improve? Or maybe trying to ski bumps will reveal my weaknesses and help make me a better overall skier if I can achieve some mogul competence.
It's essentially true. Bump skiing does not require different physical skills, although there are *tactics* that you can learn that will help you see the line you want to ski. But bump skiing will reveal weaknesses in your skills, as you suggested. Improving in the bumps will improve your groomer skiing, and vice versa. I don't think you need to hold off at all, unless you freeze up to the point where even with an instructor coaching/coaxing you, you can't force yourself to make a turn in the bumps. As others have posted upthread - if you want to learn bumps, the instructor shouldn't start you in the bumps. You'll be spending an awful lot of time doing short radius turns, and especially brushed short radius turns (as opposed to carving). You can work on this on your own, too.
There are a lot of discussions on bump technique in the archives here, although I don't know how searchable they are. It's useful to know that there are TONS of ways to ski the bumps, and one is no more or less "legit" than the others (unless you happen to be a pro bump competitor. But those bumps are seeded, which is completely different from bumps "in the raw").
I still have a lot to work on in bumps. They're the gift that keeps on giving ;-)