Right. Here's the relevant quote from Stanovich (2010):

In a magazine article or textbook on cognitive science, the author might describe the marvelous mechanisms we have for recognizing faces and refer to this as "a remarkable aspect of human intelligence." Likewise, a book on popular science might describe how we have mechanisms for parsing syntax when we process language and also refer to this as "a fascinating product of the evolution of the human intellect." Finally, a textbook on evolutionary psychology might describe the remarkably intelligent mechanisms of kin recognition that operate in many animals, including humans. Such processes-face recognition, syntactic processing, detection of gaze direction, kin recognition -are all parts of the machinery of the brain. They are also sometimes described as being part of human intelligence. Yet none of these processes are ever tapped on intelligence tests. What is going on here? Is there not a contradiction? In fact, there is not a contradiction at all if we understand that intelligence tests assess only those aspects of cognitive functioning on which people tend to show large differences. What this means is that intelligence tests will not routinely assess all aspects of cognitive functioning. There are many kinds of Type i processing that are important for us as a species, but on which there tend not to be large differences between people in the efficiency of functioning. Face recognition, syntactic processing, gaze direction detection, and kin recognition provide four examples of such domains.' This is why such processes are not assessed on intelligence tests.