Quickest way to get out of OCS is to graduate. I've known people who DOR'd in week 2 of my class and were there at least 3 weeks after I graduated.
TRUTH!
The guys in student pool laughed at us while we were getting beat in the sandpit after they DORed in the first week. They got to "relax" and watch TV, go out on town and we were getting killed.
Then 11 weeks later as I was preparing to graduate and move on with my life, I laughed at them as they bumbled around base in their khaki pants and polo shirts, practically wearing a "I DORed" sign on their back (student pool guys have to wear polos and khakis).
Fastest way out of OCS is with a commission. If it's not for you, then DOR, and no harm, no foul. If you just want to go home, then DORing is just dumb.