My inline skate coach, who's also CSIA level 3 certified, uses snowblades to transition inline skaters to skiing. In the hands of a proper coach, snowblades are an excellent tool. They require a centered stance, and enable an accelerated learning path towards edging skills (if properly taught).
There's nothing inherently harmful technique-wise about snowblades--no moreso than regular skis anyway. You may even find an instructor who's competent at teaching on snowblades up there who can take advantage of the snowblades to develop technique. (Anything's possible. Though most instructors have no idea how to teach on snowblades.) If her brother's a good carver on snowblades, she could get some benefit just from trying to follow in his tracks on an easy run, doing rollerblade turns.
I think it's important to look for releasable bindings on the snowblades though. A boot-top fracture would be horrible!
Originally Posted by ecimmortal
Really? I have never seen someone on snowblades who wasn't eternally in the back seat.
There's a limit to how far in the backseat a skier can be with a 25cm tail.
Let's not hold snowbladers to a higher standard than recreational skiers. The average rec skier is constantly either in the backseat or crushing the front of the boot.