Chris,
The only thing I can say it that given that you have old data, possibly yes. The new aircraft with no previous data on your computer will come through but I presume where a registration has previous entries, the old data is not deleted or over written and will remain incorrect or out of date.
I presume that unless you enter the new information manually, because you have the old data for N660FA on your computer, it will remain and will not be over written by the new data entered yesterday.
To check, given that N660FA has been added to the database following your notification yesterday, if you have carried out a populate since, has the new data auto-populated for this aircraft?
At the end of the day, if you are happy to stay with the original database and make you changes and additions as they occur who am I to say otherwise. Enjoy as you wish.
Alan