bad news!
Under ISTP:
People of this type tend to be: logical, pragmatic, and matter of fact; quiet, unassuming, and autonomous; realistic, pragmatic, and aloof; impulsive and curious about the physical world; flexible and resourceful; objective and unemotional.
Then under "great careers for an ISTP" its states:
Computer programmer
Commercial pilot
Crisis hotline operator
Police officer
Software developer
That was none of us!!
However I agree with Pete on this one, it can't be an instant chop factor, or can it?