It is a good thing!
That's exactly the response I got yesterday. Just means the email has been generated, but not been sent out by their system.
The good thing is, they have opened your file, and have all your details, so that's good.
They'll send it the mails/emails in mass to everyone. They do that at the end of the day I think, send out all the e-mails or post at one go.
I got my AOR in the email at 7.45 am eastern today!
So either expect an email (if you've given them an e-mail) tonight, or Tuesday since they'll be closed Friday-Monday.
Check your junk mail too just in case..
Aren't you glad you called now?