yea, and a wipe and reload is far better. You don't get all the bloatware and crap that the manufacture loads.
Also, this does not work if there is an issue with booting up the system because you still need a working OS and working drive.
Something simular to this is in most major manufactures because they no longer give you the disk. This means that you can never do a reinstall and are stuck with their bloated load of the OS. And if your drive fails or the files become corrupt you are out of luck and unless you can get the manufacture to send you the install disks (some make it easy, some make it hard), you'll have to buy the OS yourself.