This topic is not directly related with INTJ, but indirectly there are connections. Let us first consider the classical intelligence measured by IQ tests. If one reaches more than 130 points there and is thus two standard deviations from the normal 100, is regarded as a gifted - by definition 2,27%. As expected, the intelligence is not evenly distributed across all types. For INTJ and INTP (Einstein ...) there are almost three times as many gifted persons than on average.
The second topic is Multiple Intelligences: apart from the classical mathematical-logic intelligence, there is a model with eight or more intelligences in far more areas such as body domination or musicality.