Hello, thank you for your message.  Yes, the turnaround time does start when the package is received, however, that does not mean the the turnaround time of that package cannot change from what it was when you sent the order in.  There are many factors that go into the turnaround times including how many other submissions were received in the same week.  We generally receive about 30-40 thousand submissions a week and depending on how many of those are in the same tier or have the same services