Good question. In a word the answer is both.
WCers a-frame quite often. Does it keep them from winning? Sometimes yes, sometimes no. It is knowing when an a-frame isn't a problem
and avoiding it when it is a problem that separates the winners from the losers. The WCers don't care how they look, per se, they care about their time. Sometimes looking 'good' can be slow. Sometimes it can be fast.
Wendy Fischer's a-framing doesn't prevent her from making the kind of turns
she apparently is happy with on the terrain she is skiing in the videos.
@Wendy is looking to improve her racing skills where her a-frame may or may not be interfering with her desired goals. If her a-frame is blocking her from balancing on the inside edge of the outside ski, it is a problem. If not, then not. We don't know with certainty because we only have
@Wendy 's words describing her goals and her perceptions.
Most of the comments in this thread are quite valid yet we don't really know if they all apply to
@Wendy . Until we have images and/or video, we can only speculate. To the question
@tball poses, for
@Wendy , it is probably a functional issue that needs to be addressed to permit her achieve better edge angles and faster times. For those that ski for the joy of it it may be either form or function or even both. I can tell you that I've seen plenty of people skiing with a-frames that can kick ass and plenty skiing with 'perfect' style that look stilted.