Good advice whether you're looking for a new car or shopping for a mortgage. Consumer products are driven by market conditions.
Mortgages are no different.
Or a really crummy one. The mortgage process is ripe for rip-off, frankly. He was talking about the closing process, and not including the amount of paperwork mortgage applicants fill out beforehand. That's when you can miss all the fees your mortgage lender has tacked onto your loan. Fees that can add several hundred to several thousand dollars to your closing costs.