Normal procedure for most dealerships. There is a term for it which escapes me right now. But most legit dealership actually have a route around the dealership that they drive to make sure all is well with the vehicle. They check all the fluids and tire pressure and what not. Some dealerships will not touch the truck per your request but if something goes wrong when you drive home then forget heading back to the dealer to complain.
The technician is REQUIRED to perform certain check pre inventory procedures. This could void your warranty if you requested this not to be done. Most vehicles come from the plant with anywhere between 3 and 8 miles on them. The technician then usually puts on another 2 to 4 miles to perform all check procedures.