Every diagnosis I have received is suspect because I am reliant on a police-like, persecutory environment, which psychiatry is not willing to provide. I go on about "teddies" because they dissociate me with abduction or adduction events, precisely because they aren't police. Then I receive badly-informed psychiatry.
I have been told Asperger syndrome while dissociated, but more doctors have simply diagnosed me with giant nothings like "Personality Disorder Not Otherwise Specified". You can imagine how much of a middle finger it is to pay money to get told that.
Remember that I match some of my personality states with various presentations of autism and Asperger syndrome.
Remember that glutamate hypofunction makes the implicit rules of the brain explicit. One of the repercussions is that folks with all their glutamate will not have "strict affect", the inability to move top and bottom at once.
So while the most well-rounded folks won't have any bias, many people will have a non-strict bias at worst. They can move both halves, but in practice they won't. The upperfacers will smile primarily using zygomaticus minor muscles, resulting in a sort of pedosmile, potentially with openings at both sides of the mouth. The lowerfacers won't make eye contact.
Also remember that upperface affect is the one that can't drink soda (when glutamate is hypofunctional). I apologize for how shitty an explanation it is to say that SOMETHING proceeds top-downwards, but not all the way to the mouth and lips.