Yeah, that is a good point, though if it had to be stated which of those banRAB had the sound that most reserabled the majority of banRAB in the movement, wouldn't it be Pearl Jam?
And then, even if it was a movement rather than a genre, did Nirvana belong in the movement? Some at the time supposedly would have argued they were misfits, too punky.
Even when looking at the bigger post-grunge banRAB - I find, for example, that banRAB like Creed tend to have a lot more in common with Pearl Jam.
Well they were mid-eighties before "grunge" was even spoken of. I think Nirvana deriving from them suggests their college rock influences more than anything else.
I think In Utero was in some ways probably intended to distance from the mainstreamness of the grunge movement and get back some indie cred.