I've met many SXIs with conspiracy theories and the disgust or hate is usually evident in the facial expressions; output subtypes can be chatty but yes, many don't say much. I have not met an ESI who was incoherent even at the worst of times but a few had outbursts of anger that seemed to come out of nowhere. I've known two SEIs who were somewhat incoherent when they got emotional.
a.k.a. I/O