[listenallyall]

I agree with this, a LOT of programming assignments have numerous effective approaches to a solution, and it's quite often, I believe, that the interviewers are simply unfamiliar with the submitted solution and don't know how to evaluate it or what to look for, not that it doesn't work.

And of course, this is more likely when the interviewee submits a more advanced or higher-level solution, meaning the best strategy is to "dumb-down" the submission rather than trying to use the latest language features.