I can see why the books Neal Stephenson has written over the last decade may not appeal to those with short attention spans; there are long stretches where there's a lot of talking and not a lot of action, or where the action seems tedious (Half-Cocked Jack trekking through Asia), but every page is packed with the sort of thought and humor and detail that makes his books so highly anticipated by many of us.
These books are the antithesis of the hastily written, action-packed-but-ultimately-vacuous page turners that dominate the spec fic and thriller shelves in bookstores. I'd argue that his books are even be better read out loud, as my wife and I have read all of his books together, since they contain much that's provocative.
What's especially interesting is how I've seen the books derided by some here as indulgent and slow -- Cryptonomicon and The Baroque Cycle -- be loved by people across generations. I read them, my wife and I read them, her parents read them, and a friend and his teenage son read them. All of us have been waiting Anathem with great anticipation.
My wife and I are not quite done with Anathem, so we haven't decided whether it actually beats the Baroque Cycle -- Stephenson's best books to date -- or merely equals it. We think it has all of the charm of the Baroque Cycle, but is certainly a faster read. We found his introduction of new terms to be perfectly appropriate in this context, since the things to which he is referring have no direct analog in modern English, and Stephenson clearly wanted to free his readers from preconceptions.
I believe Stephenson is one of the best spec fic authors of our time, that his books are classics, and that he keeps getting better. My only lament is the four-year wait until his next one.