We built a home and closed on the day they told us, hour, minute etc.
We didn't have a mortgage.
We bought a new spec house, no mortgage, and closed on the day that they told us. Hour, minute, etc.
A persons personal financing difficulties can slow it down. Some people have complained on this forum about not closing on time and blame TV when they don't do their due diligence in arranging their loan and financing.
Outrageous!
Perils of new home buying