Holden never comes of age. He's just a jerk. Scalzi has a wonderful description of him somewhere on his blog as a 50 year old alcoholic advertising exec on his third marriage.

I think the key is more what type of reader you are rather than what generation you are or how old you were when you read the book. If you're a genre reader, chances are you read books where the spunky young heroine or hero actually deals with their problem rather than whine about it. If you prefer a more introspective book you probably appreciate the whining.