You'd be surprised at how many people seem to type as N types by people around here. I'm beginign to get very cynical about some peoples (not nessesarily yourself) ability to differentiate, N types are c.28% of the population here, so fairly rare....
Hence here in the uk (and this was primary research)
INTJ = 1% 9 people in 1014
ENTJ = 1% 10 people in 1014
ENTP = 1% 10 people in 1014
INTP = 1% 12 people in 1014
xNTP = 2%
So you are far more likely to classify S types which are pretty common garden as N's.... It' would be a very rare day to have a lot of any of the rationalist around you, and their one of two people around here who beleive their live is simply full of them.... I can tell you for free - credibility leaves the building...
That said I'm not directing this at you, but I think the first thing people ought to do is consider if they have typed people correctly.