I've aced every whiteboarding interview when the problem was the same or similar to some problem I solved before, and I failed pretty much every interview when

I've aced every whiteboarding interview when the problem was the same or similar to some problem I solved before, and I failed pretty much every interview when the problem was new to me (except when the problem was trivial, ala fizzbuzz). I think that proves how whiteboarding just tests whiteboarding skills and nothing else.