I recently got 15/20 when recognizing fake smiles from real. I think I had hoped for better since I feel like I'm relatively sensitive to body language am fairly intuitive.
You may find it interesting to try yourself.
I find all of this interesting since reading How the Mind Works by Stephen Pinker as well as several books on management and such.
The thing that's most interesting is the universality of it. All people recognize the same emotions the same way (despite what a lot of people will tell you)