I guess not - but I spent about 20 minutes reading "best band" and "best song" lists that he himself wrote with his own handwriting, said in his own words... probably 50-100 groups, songs etc.
Kind of strange that he wouldn't mention Young but it's all speculation from either of us here. In terms of the "sound", he was 100% into "American ****" - that was what he listened to, and where he played. So, yes, he listed Meet the Beatles and Aerosmith in an interview here and there but he played with the meat puppets, listed every record by Melvins, a couple by Half Japanese and some group called The Wipers that I never heard of...
Anyway... as I say it's guesswork.
That’s why my post said “I don’t know about Nirvana specifically” and then went on to talk about grunge in general.