Hmm, DFW's sentences are occasionally indulgent, but they don't sound like this. Here's a sample chosen (somewhat) haphazardly:

If we want to know what American normality is -- what Americans want to regard as normal -- we can trust television. For television's whole raison is reflecting what people want to see. It's a mirror. Not the Stendhalian mirror reflecting the blue sky and mud puddle. More like the overlit bathroom mirror before which the teenager monitors his biceps and determines his better profile. This kind of window on nervous American self-perception is just invaluable, fiction-wise.

His style begs to be parodied but this is a facile attempt, in my opinion.