[ Yeah, he's not mean enough to grade people based on their blood. That would be cruel, and Bones may be kind of a dick at times, but he's not purposely mean. Plus, Eden got the answers right, too, so he smirks. ]

Somebody's been payin' attention in class. Gold star, kid.

[ He pats her on the shoulder as he walks past, moving to the other side of the gurney that they've set the thrall. It is indeed an approving pat! ]

Pretty much what she said. Only thing is saliva's a lot less invasive, so it actually feels pleasant to the human body. Straight up vampire blood burns like hell when it comes in contact with human wounds. Sure, it heals 'em, but it stings worse than a salt-coated lemon. Novice blood's somewhere in the middle, since you're still alive.