I purchased some tickets from co.com last night at about 10 PM eastern time. I did not receive the continental.com/"We are still processing your reservation..." e-mail that's generated as soon as you purchase, but I did receive the eTicket receipt for these tickets about 30 minutes later.

Then this afternoon at 2:15 PM eastern time, I received the "We are still processing your reservation... we'll send you an e-ticket receipt once our processing is complete..."

But I received the receipt over 12 hours ago...