Blume's comment about the time it takes to check-out at PSA,, is not totally uncommon. Larger retailers are going to more electronic types of transfer stuff, and adding more layers of protections for THEIR BUSINESS,,! I see a few booths at SHOT advertising such programs & platforms.
Bigger stores,, with many employees,, where the employees may not be as diligent or knowledgeable about the laws & such,, requires several levels of "paperwork" double checks by the upper level types. That way,, it they get audited,, stuff is easily shown to the ATF,, and the business gets fewer bad audit reports.
Smaller gun shops,, where just one or two people do the actual 4473 forms and checking of the buyer's info & proper form info,, is usually a lot quicker.