not the greatest telephoto @ 300mm, but still good enough to clearly see 6 2006 C6 Z06's ready for shipping of some sort... my guess is this is the pre-production run of Z's to ensure a higher initial quality once costomer deliveries begin.
EDIT:
well, it looks like at least one of these is
NOT for magazine testing purposes, or for pre-production.
it also further leads me to believe the truck shots are of cars for GM's top dogs' personal use (this one is not a lease, determined by the Licence plate config)