Perhaps this is a stereotype based on multiple factors:

ESFj's are commonly female and make up a larger portion of society (E + S).

Females are a part of disparity.

for example, females receive less teacher to student time than males do (proven stat).

How could they not be as intelligent if not give the chance to be?

And why is it always ESFj FEMALES mentioned thread over thread, forum over forum-- again and again? What about male ESFjs? Did they suddenly die off into oblivion? Are they stupid, too?

Or is it that they could possibly be more intelligent that the sterotypical "Geek" types if given the chance to be?

And what exactly is intelligence? Just because it isnt logical intelligence doesnt mean that it isnt equally valuable. It is but a different context of intelligence type and source.