It's a little hard to tell what's going on by flightaware, flightview, & even DL.com. It looks like it's been delayed somewhere around 14 hours~ish. Could you tell us some more details? Were the pax allowed off the plane? Any food offered? Those flights (I hear) are usually full. Was it a packed B777? If so, that's a lot of people for an odd station like SJU to hafto deal with suddenly, I'd say.