On the FMDR fb page there is another photo of Dylan which has been reposted about 5 hour ago - the one where Dylan is relaxing on a living room floor and wearing a Bulls cap. In the comments below the pic someone with the initials NY implies that she is the person who took the photo on
November 10 - so very close to the date of his disappearance. He looks so very young in this photo

looking at all the pics we have seen so far, he really isn't a very big 13yo is he? In the photos and videos of Dylan and his friends he seems much smaller than them. Just stating the obvious I guess, but his size alone wouldn't have helped if someone grabbed or overpowered him.
Also he has longer hair in that pic, which IMO changes his appearance quite a bit. He could have had a haircut in the following week before the holidays, but if not I wonder why at least one pic with longer hair hasn't been used on his missing flyers.