Yes, depends on the capabilities of the pilot, as well as the capabilities
of the average business traveller, who does NOT spend hours walking
around, 90 minutes in security, hours waiting for rental cars, etc.

This absurd chart is really comparing a highly skilled, instrument
certified private pilot, flying in a high performance Doctor Killer
Bonanza, who lives across the street from his hangar and has a meeting
next to another GA airport to a businessman dunce who spends hours
wandering ineptly around parking lots, terminals, and then takes forever
to get to his Rent a Car.

And the private pilot obviously walks really, really fast. The increased
walking speed I believe, because by the time the little plane lands, the
pilot really, really, really needs to take a leak.