There are a lot of people running around in those circles who smart, in addition to being charismatic. Well, as smart as one can be with his mind closed to half the truth.
The many Pentecostal preacher and lay people that I’ve known are experientialy oriented and don’t like to read much of the core theology curriculum. That’s also why they are as a church not very well anchored to anything. They just blow with the wind. The Catholic Church would rightly point this out as an example of why you need a large hierarchical church to keep the faith anchored. I see some merit in the concept, but I think that Paul left us plenty of doctrine if one is willing to read it.