To be fair, in my country 4-like behaviour is in many ways in direct opposition to the national culture, so other 4s might be withholding/disguising those traits. I know I kinda do. The two people I listed above are both foreigners (American and English), so that might tell you something.
EDIT: Make that 3. Just remembered another (American) friend of mine who would have to be a 4w3. Again with the foreigners.