Rand's style is appealing enough for those with teen-aged sensibilities -- teens are, after all, attracted by Rand's kind of breathless outrage, which matches their own.
As Whittaker Chambers so aptly put it:
Since a great many of us dislike much that Miss Rand dislikes, quite as heartily as she does, many incline to take her at her word. It is the more persuasive, in some quarters, because the author deals wholly in the blackest blacks and the whitest whites. In this fiction everything, everybody, is either all good or all bad, without any of those intermediate shades which, in life, complicate reality and perplex the eye that seeks to probe it truly. This kind of simplifying pattern, of course, gives charm to most primitive storyknown as: The War between the Children of Light and the Children of Darkness. In modern dress, it is a class war. Both sides to it are caricatures.
Rand is offensive to adult tastes, precisely because adults are not fooled by her strident emotional overtures. Adults have seen "those intermediate shades which, in life, complicate reality and perplex the eye that seeks to probe it truly." And they properly reject those who would have us pretend that those intermediate shades do not exist.
Sounds like an opinion - hence my tagline...