Earlier quoted context omitted.
I think this is overly pessimistic. While there's definitely shady companies out there who will say this while having very poor security practices, it's tricky demonstrating that something didn't happen. Say you had detailed audit logs for example. What happens if there's a subtle bug in those systems that allowed the hacker to proceed without logs being recorded?
Never trust any company with a PR department at all, they're all opportunistic liars who's priority is limited damage to the company, not telling the truth. They only do the latter when they think it will have the effect of the former. Really, don't trust corporations at all. Even if the circumstances of life force you to do business with them and hope nothing goes wrong, that's no reason to ever trust them. The bigg…
So you're saying we should trust Twitter? :)