...or, and this if far more likely, he will find areas that need improvement....perhaps he is spending a little too much time BSing with his customers or is getting signatures when he should be either DRing or CIRing or is doing his customer a "favor" by making multiple drops rather than delivering to a single location at a business...maybe he is driving more than 1 mile in either direction off his main route to have lunch at his favorite spot or he may be spending too much time in the cargo area or may not be parking to where he can deliver two or more residential stops from the same parked position...
Any on car or business manager can find ways to improve even the most efficient driver routine. The only difference is the degree of improvement that can be achieved and whether the driver incorporates those improvements in to his/her daily routine. It takes less than a minute for an on car to figure out if a driver is putting on a show during a ride along.