It's a question of degrees. Before I started skiing, I was a total salamander. My workouts consisted of distance running on paved concrete, Nautilus Workouts, pre-choreographed aerobic classes, etc. My first attempt at skiing was an absolute disaster, even though I was infinitely stronger, and had much greater aerobic endurance than I do now. I was only able to learn to ski after switching to routines that provided more agility and quicker reaction times.
While I will probably never be as agile as a ski racer, I have a much quicker reaction time than I did when I was training for marathons.