Hello yc01,
I submitted my case at 9/20 by UPS. However, UPS sent it to the wrong place and it take one more day to reach NSC (UPS refund the mailing fee to me). So NSC received it on 9/22. Notice date is 9/28. Sent out letter date is 9/29. I received the letter yesterday afternoon (10/03). The checks have been cashed this morning. That is all my information!
I think you will get your receipts today! Good luck!
By the way, my friend get his I-140 approved just in 10 days (see his post today)!