This is a lot to keep track off. If the account was really compromised, why would the user only reveal such information. I'm not sure but there would be some other useful information available other than releasing some private messages which doesn't profit the supposed hacker in any way.
If it was indeed a targeted attack to divulge the contents of the private message, what means were used? I would think there would have to have been a slip up on the part of Bitcoingirl.club for the account to get compromised (although someone on the other thread hinted at his/her email address being public at a point)

If this version is true, I would suggest bitcoingirl.club posts their email provider (as bpip states that the password was changed via email), as the ease of this supposed back raises some serious privacy concerns.