I would echo the comments from Superfluous.
You do not generally open up the factory shop floor and reach max output immediately.
I previously worked for a Biotech where the leadership tried to tell the street that after approval of their patient specific cancer vaccine, that they would immediately have the facility full of bench top fermentors at max capacity. That company is kaput.
Plus with this project Acura will be cutting their teeth with ordering/receiving parts specific to a build (like seats: manual, power, leather/alcantara, leather/leather, color) and that will require some coordination (i.e. takes some time to get used to).
I will also be interested in how they will train the sales folks on how to do deliveries. When I picked up my Q50S Hybrid in 2013, the dealer had not been trained on the car (totally on Infiniti for that) and it was pretty funny to watch 2 guys from the dealership try to figure out the functions.
As for build time, did they not learn anything with the 100+ they've built for tests etc to date?
And this high tech facility should accommodate parts easily as needed for a 10 day/specific car build time.