when I climbed it, the top most section of the couloir had nearly 100 ft of exposed WI at angle of about 50 degrees. If one waits even later in season (for example at the same time I climbed this, all three couloirs on N. Peak were still neve), I am certain substantially more of the route will be iced over making for a longer WI section.
Rob, I don't know, about the same steepness as the V-notch and felt about the same difficult as well as I could remember (at the top section at least) so I just gave it the same rating to be consistent with both. I really don't care though, I think with that being discussed on your ice routes post, this would be better rated AI2 (with the V-notch too) and the route I posted on Dade as AI1.
I'm not so good with ratings either. I appreciate hearing the opinions of more experienced climbers like Rick and Alois. Not sure why ratings in the Sierra are the way they are either. I fixed the forum page listing to correspond to the new ratings you assigned.