Definitely not every detail. Even a simple - "Penalty for duplicate content," "Penalty for thin content," or "Penalty for low quality content," would provide some context. Was it manual or automatic? These are all "best practices" that most spammers know but since Panda is a broad algorithm we have no context on which portion is hurting us. And I would say most Panda clients we've worked with have unintentionally been caught up by duplicate content, etc.