What are the great sentences in genre fiction?

What makes a world-class literary sentence, and can genre writers ever compete with stylists such as Jane Austen or James Joyce?

What makes a great literary sentence? I've been thinking about this in advance of a debate I'm chairing at the Oxford literary festival this weekend on whether there is any difference between literary and genre fiction.

Then, as if from the depths of my subconscious, up popped a blog from The American Scholar listing their editorial team's 10 favourite sentences. (Well, 11, actually, as they threw in Truman Capote as a bonus.)