I was also thinking ILE might be possible, but Ne-ILE, same as Peter. Wouldn't say though--stewie appears to portray somewhat more of an Se/Ni value system in this kind of show though, so I tend to lean toward EIE. He has weird moments of science and logic, especially in the beginning, almost LII-like, but portrays EIE most of the time.
This seems right.
This seems potentially true. Not sure why all the idiots in this show would be ILE... hmm, maybe McFarlane knew someone