Ah, I just realized that @Biblio had answered a question of mine regarding だけは back then in the Marco& club:
So maybe the " 東京がすごい。こんな田舎町に住んでいても、その噂だけはよく聞いていた。" is something like “‘Tokyo is amazing.’ Even though I lived in such a small countryside town (where you don’t get much info about Tokyo), if nothing else, this rumor is something I often heard.”?