Board Thread:General Discussion/@comment-25266931-20170206193307/@comment-26397825-20170210064410

They can be resisted, but it's not time based. It's based on whether you know there is something tor esist, really.

In Pyrrha's case, she didn't know there was something to resist, she'd never seen Penny in action, and she was already under extreme emotional duress. Hence, it worked extremely well.