I would disagree with that totally. Is she over the top? Oh yeah. 60 pages of monologue by Galt prove that. But the fundamental principles she lays down are spot on.
I started that monologue but ended up skipping it after like 15 pages, I've never read so much that didn't actually say anything. The story laid out her philosophy, the monologue should've been left out or at least trimmed dramatically.