I believe I can spot these types, (or at least I'm confident with INFJ's) because of the peculiar manner that their eyes move and focus. Granted, not all of them have this trait- but when I see it, I know it. It's almost as if they are detached somehow. It's like her head is in the clouds, but she's taking in the situation at the same time. It's similar to being able to tell if someone is daydreaming.
Has anybody else noticed this? Or any other 'signs' for types?