Oh boy, this is kind of scary. Not that we have differences. But if you for some reason are in contact with social services, I’ve seen on a TV documentary, that they use this as a significant parameter to judge whether the infant is properly cared for.
I bet practices differ, but it seemed like if the infant didn’t seek eye contact, that was something that was universally accepted as a very negative sign.
The documentary I saw, there was actually a couple that had their infant child taken away, partially based on this issue! I’m not saying they made a mistake, but there definitely is a potential for it.