Interesting. I got 15 out of 20, which is more than I expected.
Wow! Impressing. I thought I would get 18-19 and i got 13.

Maybe my self-impression of being very good at reeding people isn't as good as I thought!?
Since I knew they were gonna smile, I didn't even bother to look at the mouth. Rather, I studied the eye region before, during and after. Perhaps it's just the "smiling with the eyes" phrase that's stuck in my head.
I usually end up thinking to complicated, and destroy the test results with my own thoughts.

I usually end up thinking to complicated, and destroy the test results with my own thoughts.

Me too. The problem with multiple-choice tests is that when I'm unsure of the answer, I'll analyze the previous answers and see if I can detect a pattern, and then use the pattern instead of my gut to decide what to answer. I think this caught me at least once on this test.
I got 16/20. But I already knew to focus on the eye areas.
It would be nice if apparently genuine smiles were easier to fake. I don't like smiling in photos because the smile is too obviously fake.
I scored 16/20. But the thing is, is that I thought I might be wrong every time and it felt like more or less a guess.
It is more or less a guess. You can't peek into anyone else's mind, no matter how much you try. You just need to find the right heuristics.
i couldnt see the smiles i just guessed
I had to "replay" the movie sequences to see the smiles..
Did you do that?
I got 14 out of 20 smiles only and I'm an NT!
This is a fascinating site- thanks for sharing it. I also took the personality test and it revealed I am a "mastermind", which is rare in the UK evidently. (I live in the US).
BTW, I seldom fake a smile, but among the people I know who do they tend to be phony in some way. Just my opinion anyway.
http://www.bbc.co.uk/science/humanbody/mind/surveys/smiles/
Interesting stuff.
It doesn't tell if your autistic or not, but it gives some interesting information.
I followed the eyes and looked for wrinkles.
He, he..
Unfortunately I even find it difficult to look into their eyes for as long as it takes, i like better to look at the mouth. ..maybe that's why I got 13 of 20. 
I definitely understands why some shy people is being accused of always locking at womens boobs. 
Sunglasses helps! 
I scored 9 of the 20, only felt sure on a few of any of my answers. It's a rather awkward-looking test. I can only imagine how the people were instructed to smile, how a genuine smile was 'generated,' and it would seem to me that unless it was set up with them being instructed that the videos would be about something *other* than genuineness of the smile, they'd all (or nearly all) be fake to some extent. I'm tired & probably not explaining this well. Did that make sense at all?
Yeah, I wonder how they managed to provoke a genuine smile in such an artificial setting while also maintaining about the same timing as the other smiles.