As someone who has been using a Macbook for 1 1/2 years now, I'm gonna have to agree with much of that (although I know little about graphics work with a Mac, my friends do just fine on a PC). I'm sick of my Macbook, iTunes, 1 click mouse, and no customizable parts on a desktop, and I want to build a desktop so badly and get back to Windows.
Also, I'm very skeptical about the Macbook Air because my Macbook has a 2.0 Ghz Core Duo, while the Core 2 Duo is not much better for laptops and the Macbook Air has CPUs with lesser clock speeds. My computer has been trudging along a good portion of the time, and for a computer with roughly the same specs as my Macbook, it doesn't impress at all.
I have crashes just as often as I did on Windows, if not more.