All the Dell Windows CD / DVD's I've ever had are regular OEM CD's i.e. if you use them, you'll get a plain vanilla installation. Device drivers and bloatware are usually on seperate CDs.
now that you mention it........ When I got my DELL laptop thru that old company I worked for....I got both a Windows XP Home dition & a Windows XP Pro edition CD both brand New unopened....and my laptop came preloaded with WindowsXP pro and had 3 other CD's with all the drivers etc.....
so yep, I guess they all come that way..... ( from Dell that is ) ( sorry my memory slips a little more each day :-/ )