AYG
Yes - good point. The cases I'm thinking of featured girls who were much older than Ben and Maddie, so they recognised their family when they were reunited.
If Maddie were found, say, in 10 years time, it's likely that she would have very little recollection of her life before she was abducted.
Another thing about this case...I think that many people just want 'to know'.
You know...at the moment, it's like watching a mystery, and then someone switching off the telly before you found out who did it (sorry for the horrible analogy - couldn't think of anything better).
The Maddie McCann case is particularly baffling because it was like she simply vanished into thin air. No CCTV of her being led away, no forensic clues, nothing.
I think a case like this sets the imagination off, and people somehow need 'closure'.
They want the answer to the puzzle.