Terry (or indeed anyone else) have you come across John Gardener's concept of psychic distance? It's incredibly useful, and I'm always surprised that it's not in every how-to-write book in the land.
Yes, very irritating - he shouldn't say "young" when he means "starting out regardless of age". (I have a related quarrel with writing prizes for adults which have an upper age limit). But a good book, nonetheless, though eminently quarrellable-with on various grounds.