A few questions about usmc boot camp graduation?

It is possible to be an E-3 at graduation IF you have a certain number of college credits before entering boot camp. Actually, these people were E-3's before they entered. The Dress Blues are issued to the top graduate. When I was in, one graduate from each platoon was awarded Honor Graduate. It does not have to be the highest ranking graduate since this honor is decided by the drill instructors and tests done during boot camp. Not likely someone who has rank when entering boot camp would be upgraded during the process. Possible, but not likely.