That is the thing with all these 'self-assessment' tests, including the AS/EQ/SQ ones. They are good for people who do have a formal DX or who want to validate their own self-DX, but for those who "Don't Know", they can be misleading.
I am reminded of the 'Barnum' principle, or the 'Forer Effect' in Psychology.
Certainly there are things that *could* fit, which I do remember from Childhood, but they are only disconnected fragments and there is such a thing as 'selective' memory, meaning that you remember the things that are relevant to 'advancing the hypothesis' (in this case, testing to see if there is evidence of PDD), while forgetting those things that might go against evidence of PDD.
I was looking this stuff up on the Sceptic's Dictionary, as well as Wikipaedia a few days ago.