I agree with VSP mostly also here, Skiing is equally important to teaching. L3 PSIA is not particularly difficult skiing. There is no reason a full cert should not be able to ski that well or better. Ski instructors need to be able to inspire and demonstrate a wide myriad of odd tasks and look like they can do it in their sleep. When you hear someone say you make it look easy, then you're on the right track. Instructors do NOT neccessarily need to be the rippingest skiers on the mountain.
What is unfortunate in my mind is that PSIA and other ski instructor orgs do not do more to promote the teaching side, as it seems the emphasis is quite often on instructor skiing. I have some theories on this. I think part of it is that higher level instructors in the PSIA world are hungry to teach higher level students. Often, other instructors are the highest level students they get. I have been over and over to clinics and cert prep clinics where 99% of the energy was oriented towards teaching the instructors how to ski better. And they all needed to ski better. But when do they teach how to teach? I have found those moments to be few and far between. You can learn some things by watching how they teach, but then again you're watching them teach other instructors which is not the same as teaching real students. Last year at an exam I learned more about how to teach then I have ever gotten from any clinic because I could watch the way the examiners grilled the candidates and they often provided helpful feedback about teaching. This was on the teaching day, not on the skiing day. And interestingly, on the prep day, most of it was spent toning up their skiing, not their teaching.
I think emphasis should be equal. But I contend that PSIA is currently putting too much emphasis on the skiing and not enough on teaching during clinics. That being said, I feel the exam should be at least as hard as it is now on the skiing.