It definitely is. I'm daily driving a Macbook Air, something which I never thought I'd say. Even beyond the CPU crunching performance, I'm not sure what part of it is causing this, but it's just so much smoother for a variety of misc things. I suspect either better coupling with the integrated GPU or the unified memory.

But many little things, like the smoothness of the OS, or the way that the screen wakes from sleep instantly are just superior to my much more expensive, and power hungry desktop. Of course, my desktop can still cream it in a GPU workload but for programming, it's amazing.