Training - quality vs quantity

This is an ongoing debate, but quality is perhaps winning.  What about the 10,000 hour rule?  (You need to put in 10,000 hours in order to become expert at an activity - K. Anders Ericsson, later popularized by Malcolm Gladwell) - How does quality factor in to that study?  Overall, I take this as a good news story for us recreational skiers.  Yes, we all know you need to put in the work to truly master something, but we are all different in terms of  natural abilities and indeed aerobic capacity.  Either way, allows me to believe that if I do the right thing (vs pure volume) I will progress.
Norwegians on volume - Faster Skier article