I have seen on here questions like, "can someone be INTj and still be dumb" and "S types are dumb" and "STFU intelligence doesn't have to do with function" (not sure about what was said about types..)
Intelligence intelligence blah blah bullshit blah blah
so um yeah it seems you could draw both conclusions:
The way you receive and organize information does not correlate to intelligence
The way you receive and organize has a lot to do with intelligence.
and maybe one's intelligence is something separate and your type is how you prefer to behave and/or use that intelligence. (which makes me kind of sad because in my MBTI consumption days I was always deemed as having a happy marriage of ability and interests as an INTP).
If the last statement is true then i still think that there would be ranges of how intelligent you are-- for example if the way you receive information MUST be in a systematic and logical progression then.. you must have SOME idea of how to use logic. it is impossible to receive information that way and say i dont know what this is, this makes no sense. So while someone's not automatically a master of their lead functions, they've got to have at least a decent understanding and usage.