It is often the parties involved that can determine how long closings take, and the relationship with escrow, title, lender etc.
In the big picture, although it’s usually the largest purchase in someone’s life, it’s just another file to everyone else involved.
An underwriter or escrow officer isn’t going to rush a file because the buyer agreed to a fast closing.
Having agents or loan officers that are proactive and anticipate problems and deal with them promptly is what makes the difference.
Letting things sit around for 3-5 days each time and not following up creates delays and causes stress.
An agent encouraging a buyer (who needs a loan)to write an offer and close in 21 days and rushing to lift contingencies is irresponsible IMO.
Dealing with a lender who isn’t on top of conditions can also be full of headaches.
There are often going to be problems and delays but many times they can be minimized or avoided.
This becomes the difference in who you chose to deal with.