I think that’s correct. I can’t think of any exceptions for now. I guess JFZ managed to find a neat way to avoid grammatical terminology. Interesting.
EDIT: What @AndyMender said is useful for the practical side of applying godan and ichidan conjugation knowledge. I remember doing a breakdown with examples in a fairly recent post (within the past 3 months?). You might want to give it a look.
Found it: Grammar Doubt 3! - #12 by Jonapedia