I complained about the lack of an ADTP customer report report about 15 months ago now, (further up in this thread).  I DO note that Intuit HAS been adding additional useful functionality, but I would like to point out that the data necessary to create the report we are requesting "appears" to already be calculated and stored somewhere in the database.  My evidence of this is the new feature I noticed in the customer record recently:

How does QBO know this customer pays on average (my words.  Yours is "likely") 18 days early.  This value HAS to be calculated and stored somewhere, or even calculated on the fly when I open the customer record.

Just give me that information for each customer in a report.  I can work with that.  I can take that information and subtract, or presumably (hopefully) add, that data to the customer's due date.  (This assumes that the data in this example also tells me if said customer is "likely" to pay "X" days late).