Much of the modern ski technique — most especially ski carving — is derived from World Cup ski racing. It’s similar in the way that automotive companies learn what works from the extremes of the race track. That knowledge is passed down to consumer vehicles in order to make them more reliable and technically advanced.
The same is true with ski racing. What’s learned on the race course can be modified and brought to the recreational ski enthusiast looking to really improve his or her technique.
For my money, no one does this better than Harald Harb and Harb Ski Systems.