I have read these same things about looks and autism. My thoughts on "beauty" are that it isn't so much that any one person is more "beautiful" per se so much as it is that they may have a high degree of "symetry" in their facial features. There are some studies out there that have suggested that facial symetry is a potential reason among many for why we find some people to be more "attraction". I wonder if this is what has been observed in autistic people? Me and my husband and children all have a lot of symetry to our facial feature..... of course I am WAY better looking than my husband is!!
Oh yeah... I am a first born girl. My brother, who has a lot of traits, is a second born male. My oldest brother, who is the first born, also has some traits. However, he doesn't have as many as the other brother does.
I did some more online research on this concept. The idea of beauty and autism appears to be quite prevalent. It appears that many people believe it to be true anecdotally, though there is no scientific evidence to support the position. Then again, how do you quantify beauty? That's a tough one.
AnAutisticMind, I just remembered something. My mother said that strangers would stop her on the street and comment on how beautiful a baby I was. (No joke... really!) To some degree, people were being polite, but when they went out of their way to make a comment, there was probably something about the way I looked that struck them.
Oddly enough, I have received the same sorts of comments from strangers about my 10-month old son. Comments from friends also go this way, "You always HAVE to say that someone's baby is beautiful, but yours truly is!" At the same time, it's absurd for me to ponder whether he is on the spectrum based on his looks (especially at this point of his life).
Not entirely related, but some food for thought:
Who we find attractive could have implications for the prevalence of autism, say researchers
http://insciences.org/article.php?article_id=1181No One Knows Why Autistic Children Are Often So Beautiful But it can be a great comfort to their parents
http://www.paains.org.uk/articles/beautiful.htm