for the noob like me who is not a drummer and have never really done much with drum tracks, are the drum loops in Garage Band already mixed and tweaked and ready to go? Sorry if this is a bone-head question, I really don't know anything about them. I see all these youtube videos about mixing etc and the number of drum busses some projects is new territory to me. Granted I think these are live drums and not loops.

Are the Garage Band loops actual drums recorded and mixed et al and ready for immediate consumption, is my real question I guess.