Edit: *On a not-unrelated note, if I had a time machine, Dale Carnegie is one of the five people for whom I would time travel so I could punch them in the nose
You say that, but at the moment you walked up to him and got within arms length, he'd look you in the eye and bark, "Can I help you!?"
And you'd blush, look down at your shoes, mumble something and walk away. Leaving him to spread his treacherous poison among the masses.
As to the OP, my answer is no. I have all of my life, been incredibly hyper intuitive. I have posted on here on more than one occassion, how when I was a much younger Lothario, I used that gift/curse for evil. But it's just something that naturally happens to me. Constantly. There is no turning it off. I've even had friends and family members rely on it to help them assess other people in their lives. It used to drive me crazy sometimes. Now, that I'm older, I hardly notice it. But, it's always there. I'm not exactly sure how it developed. I used to think it was because growing up in a military family, I attended 16 different schools from K-12. That experience alone made me have to understand my environment and quickly assess my place in it; or risk being eaten alive. I learned to not only understand it, but how to easily manipulate it. Now, I'm not so sure it was gifted to me through my environment. Why? My son has the same ability. I think it may be genetic now.
But, I have never felt that introverts are conceited. While they can be; I have never felt that their introversion by itself came across that way. I think some extroverts are intimiated by introverts, because they don't understand them, or they don't respond the way the extrovert expects or desires them to when they interact. Those who possess low emotional intelligence or are immature can easily label introverts a certain way as a defense mechanism.