Um-m-m-m, no. The grey discs that ship with all new Mac are not "Machine Supplied OS Discs," whatever that means. They are System Restore discs. They are not designed to install an OS on your computer. Your computer ships with an OS preinstalled. The discs contain a copy of this OS and all standard bundled software. System Restore discs are designed to do exactly what their names imply. Your computer's System Restore disc is intended to restore your system to its as shipped state. It may also contain uninstalled optional software.... If we're talking about Machine Supplied OS Discs, CPU Drop-In and other Upgrade discs, then yes, Apple indeed does and has used "crude verification practices".