None of the above IMO.

No details: there's no way of telling if someone is talking BS with this option.

Vague specifics: oxymoron the potential for confusing is just as great as the potential for helping.

Detailed specifics: this may be harmful for the dealer since PAG does monitor forums like these. Dealers may not fully explain the discounts they are offering customers and they can get into trouble.

I think people could disclose 'selected specifics' i.e. what is disclosed is accurate but maybe incriminating details are not disclosed.

Just my 2 cents