In real world terms, the Yoga's performance bodes well for the tablet- and mobile-inspired emphasis Windows 8 brings to bear.
In all instances across all normal and hyper-normal usage (lots of apps open, multiple browser windows, large PPT decks, multiple videos), Windows 8 felt snappy and immediate, with no lags, stutters, or delays whatsoever.
The only real exception (of course) is gaming. While the Core i5's integrated Intel HD Graphics 4000 chip makes for fast OS operations, you won't be playing anything but retro-style games (hello, FTL!) and basic MMOs and MOBAs here. This said, for a low-powered system, a 3D Mark score of 8,100 isn't too shabby.
For a consumer laptop, there's refreshingly little bloatware installed. Also refreshing: Lenovo provides some truly helpful first-party software as well, like the presentations app named Lenovo Transition. It allows you to pre-determine which applications automatically launch in full-screen and which do not when you tilt the device.
One of our only real significant problems with the Yoga is that the touch display feels inconsistently accurate. Pinpoint touches on web pages, menus, navigation, and windows felt precise and accurate. But swipe gestures within the Windows OS - particularly those origination off-screen - felt less precise. Most of the time, OS swipes work fine, but every now and then you'll have to repeat one.
Sound quality delivered from the stereo speakers is solid - particularly at lower volume levels - but not great. No surprise there, as very few mobile PCs can boast top-notch sound.
Lenovo's Motion Control is a simplified version of Kinect that uses the Yoga's webcam to detect simple gestures to cycle through music tracks, pages of text, and more. With it activated, all you have to do is slowly swipe your hand in the air left-to-right or right-to-left to make it happen. It's pretty cool, although having the webcam on all the time will make some people nervous.