Well, in the source:
<body>
<div id="DemoScreenreaderText">Thanks for checking out this Internet Explorer Test Drive demo. This demo uses HTML5 and CSS features, including animations, transforms, canvas, callbacks, WOFF Fonts, power efficiency, touch, independent animation, smart fixed position elements, and more to provide an interactive Penguin loving experience this holiday season. Benchmarks are random and this TestDrive is no different. Enjoy!</div>
And pressing letters on KB does stuff.