Use oil in the bearings. Mechanics have been replacing the grease in hubs for oil for generations before time trials. Remove any seals. (Don't take this seriously if you want your hubs to last in real conditions. )

New production wheels almost always have the nuts/cones and locknuts too tight. If the shop mechanic didn't adjust them, they would spin very few revolutions. If he adjusted them tight enough to not have any play in 200 miles, they would still be a little tight.

A fair test would have been the number of revolutions your wheel would have made brand new, 30-40 years ago.

Ben