>>7619890It depends - if you've studied up on anatomy and proportions and all that draftsmanship stuff, even if your pencil skill are rusty, you'll still be able to sketch well enough fairly quickly.
If you gained a fairly good understanding of tone and colour, should be able to wrap your head around how to go about painting regardless of the medium.
However, if you were ctrl+z-ing with every stroke, or were highly reliant on certain digital trapping, such as layer effects or digital tricks in general, then you were sort of using digital as a crutch and would have a much harder time transitioning.
So you're right... depending on how hard they were leaning on their drawing program.