Yes but that assumes they have staff just sitting about reading their paper until your order pops out of the printer. No Company can afford that, especially one as big as Dell.
You new order goes to the bottom of the pile for the team building your model to get around to.
If you happen to Tesburyson's and order 20,000 systems for new stores, the teams building single orders get re-deployed, so we have to wait. It's a fact of life.
If you want a system off the shelf go to the people who sell cardboard boxes with laptops in them. If you want to customise one to your exact needs, you have to be patient.