Recently, Bill Denton posted:

"Backlog" is really not the correct term for the Eclipse situation.

A more accurate description is "orders booked".

Neither the customers nor Eclipse expected that everyone would be
able to get their airplane the day after FAA certification was
completed.

Customers were given something like an "anticipated delivery date"
that, in some cases, was probably several years in the future.

Perhaps you can explain the difference between this and a backlog of
orders? Are you suggesting that the orders weren't actually placed, and
that the reported figures represent mere inquiries into the delivery date?
I don't see why any company would keep a count of such inquiries, much
less report them as orders.

Neil