I received the Kansas State assessment scores in the mail for our 13 year old daughter Maria and she scored in the exemplary category with mostly perfect scores. When I told her of her achievement she giggled and smiled then said, "Wow, I'm smart!" Then she said sci-five mom!" (What a geek.) (A sci-five is a cross between a high five and a Vulcan hand salute.) She aced the knowledge of Greek , Latin and Anglo Saxon portion of the test which means she's now smarter than her mother : ) She would'a aced the sci-fi portion of the test too had there been one.
The Vulcan nerve pinch is the only sign I'm familiar with.