Paul Thurrott published a review on Windows Vista Build 5536

So what's new in 5536, you ask? Performance is better, even much better. (Though the three times performance improvement baloney you might have read elsewhere is not only impossible but untrue.) It does a much better job of finding and correctly installing device drivers: On my main desktop, even the sound driver worked automatically after the first Windows Update run, a first.

Windows Vista Build 5536 Review