I'd say it depends on how others perceive them, unless they're purposely behaving robotically.
I have an INTJ friend who sounds very robotic to my other friends, but not in the least to me.
And most of the INTPs I've talked to sound more sedated than robotic.
I think it depends on whether you see types as strictly Jungian or in Myers terms.
Rationals/J type of Introverts approach the world with a set outlook, and have to loosen up to be any more dynamic in the way they percieve and address issues. Even the F types. I think that lends to a stubbornness or uptightness that could appear robotic, especially in an NT. If someone keeps promoting their senses though (which is a lot more momentary and changable), instead of judgement, they're probably going to come off more gregarious, not as reliable in their views... And "human".
I don't know who functions more on a "practical" level though. I think INTJs probably take themselves too seriously not to.
"How dreadful!" cried Lord Henry. "I can stand brute force, but brute reason is quite unbearable. There is something unfair about its use. It is hitting below the intellect." ~ Oscar Wilde - The picture of Dorian Gray