The retailers are probably used to all their games coming in each month being known before the end of the previous month, with an exact date they'll receive them.
If Tru Blu come along and do it differently, then the normal ways they'd check that info won't be right, and thus the info that a random person responding to an email has access to won't be reliable.
They will seemingly be surprising retailers with the exact release date as much as they are surprising us.
Also remember - there were companies that sent out dispatch notices to people saying their console copies of Ashes Cricket 2013 were on their way in June.
I read today on SA website shared by Matt that it is confirmed for march (let alone PS3 they were publishing PS4) so what to trust.
My point was more that Ross has mentioned that being included in catalogues is part of their marketing, so it's the appearance at all and not the specific info that is of note.