I can assure you that my 5000C has no drag. It's basically a free spinning reel, you can spin it forward or backward and that's the only way to allow line off the reel, with the exception of actually releasing the bail. My 5000 (D I believe) did have an adjustable drag but the 5000C did not.
I'm going to hold off on trying to figure out any more regarding this till I actually hook a fish on the thing. Might help for me to have some context