Personally, I don't label music. There's far too many genres that are similar and run into each other. Pop-Country, Rap-Metal, Blues, R&B... things evolve drift into each other. To me, music is music. If they are "poppy," it doesn't matter, because they were the first to make it big, inspire other bands in the genre, and they added to it, before it was dubbed as "grunge." And, no, pop is not an insult to me.
H-D