The discs are likely being sent out this week. I wouldn't really call it "ratty customer service," since they were very rapid in offering the replacements and made the process very easy. What more information do you expect? They stated in the phone calls and emails that they'd be shipped within 5 business days of August 10th.
There should have been an acknowledgement after they recieved the information. I got one when they replaced the BTTF and Superman discs way back when.