By now, you’ve probably seen Apple’s promo video of the iPhone 4S’ Siri in action (if you haven’t, you can find it below). But how well does it work in real life, when there’s background noise and chatter. Pretty darn well it seems, as demonstrated by StuffTv in the youtube embed above. Siri’s able to “comprehend” essentially everything thrown its way and at surprisingly quick speeds. Who wants an iPhone 4S now simply because of this wickedly cool feature?