I've had a CODA interpreter in a ITP with me, and it's been a very interesting experience.
The CODA had never taken any ASL or intepreting classes before, this was all new to her. She grew up interpreting for her parents, neither of whom had finished high school.
She took one semester of the ITP program and dropped it because, "it wasn't for her" and " she needed to learn someplace else."
She came in with a very narrow perspective without an open mind. She saw, and sees, ASL as the language where you "take out all the words you don't need, and just put in what you can see, touch, smell, and taste." She says we don't need all this interpreter training/ brain analysis stuff, "you just do it." We had a skilled interpreting teacher, though not a CODA, and this woman said, "I can't learn from her, she doesn't do it right." She stubbornly was a thorn in that teacher's side the entire semester.
Here was this woman who had been interpreting over 30 years, whom our class could have learned so much from, who made the class much more difficult. It was totally interesting though to see her perspective compared to the majority of the class, which was the "I learned ASL in college" group. There were some in the class who had learned it in some way growing up, but no others were CODAs.
She proved that not all CODA's really understand ASL or deaf culture, and that not all CODA's make good interpreters. I very much respect her as a person, she is a very nice woman, but an ITP was not made for her.