Interesting piece - thanks for that, Jan. Though who says "everyone loves" A Christmas Carol? I certainly don't. And although The Turn of the Screw is indeed a masterpiece (if you don't mind your masterpieces flawed and equivocal) it's just a completely different project from, say, Portrait of a Lady, which is also a truly great book.
I know fat books with very little going on in them - grossly overwritten, or just boringly written and overstuffed with plot, and fat books which are immensely rich, with every word evoking a further three that aren't on the page. And if every word of a 130,000 word novel evokes a further three... you have something like Rohinton Mistry's
A Fine Balance, which is a sizeable masterpiece. Rose Tremain's Music and Silence is pretty substantial, but neither of them could be any shorter and still be the brilliant books they are.
I'm a Carver (Lished) and Hemingway fan, but I teach many writers who hope their writing is spare, and in fact all it is is impoverished. Pared down and short can be cowardly too, and lazy: a refusal by the writer to do the work s/he should be doing. It can also be quite as mannered in its self-consciousness, vide Hemingway at his worst. Less is not always more: quite often it's less.
<Added>Also, the discussion gets confused between lots of words to say one thing - which may be wonderfully written, or just over-written - and a long book, which may be written in very spare prose. My prose is pretty economical in how many words it takes to evoke/state/explain/narrate something, but I write quite long novels.
I'm not sure which that McCrum piece is talking about - he doesn't make that distinction.
<Added>Meant to say, I blogged about this question of spare/impoverished versus rich/purple here:
http://emmadarwin.typepad.com/thisitchofwriting/2010/07/lots-of-them.html
I see I was rather cross at the time...