Being intelligent and/or gifted doesn't prevent one from getting caught up in a Cult, but I do suspect it is more difficult today in the "age of the internet" where most cults, like JWs, have been exposed and criticism is widely available.
I think it was those (that I perceived) intelligent and gifted JWs that kept me in the religion longer than I otherwise would have been involved. There were several brothers that I really admired. They were educated (so I suppose I figured they should KNOW it better than I -- esp the brother that had been an ancient history major).
Today, I don't think there are many "educated" that remain, though some are "intelligent", but still caught up in the cult and drinking the Koolaid.