It seems that unless a product is running OSX, it is dismissed outright in these parts. And you get some crazy comments whereby the competition should pack their bags and go home because they are never going to win. But did you ever stop to consider that it's the company you're praising and defending that's causing all of these problems by refusing to allow it's OS to run on anything other than Apple hardware? The problem isn't 'haha crappy Dell and their crappy laptops' it's 'haha crappy Apple and refusing to let me install OSX on my Dell laptop'. The quicker some of you realise that the quicker we might actually see OSX as a standalone OS for a whole range of non-Apple hardware.
I don't think this particular issue is about Windows/OSX. I think it's more about the physical machines themselves.
OSX being proprietary is best left for another day and thread.
Even if I were to completely erase OSX from my MBA and install XP/Vista (Yecch!) my MBA would still be (IMHO) the top-tier superior machine from a build-quality and all-around useful piece of hardware. This is of course that one realizes the MBA and all ultralights for the market it is intended. Some people on this forum still thinks super-ultralights should contain the same performance specs as machines weighing 2-3+ its physical weight.
Nonetheless, I run XP using VMware on my MBA and the performance of the XP virtual machine is faster than my prior dedicated Sony Vaio. My XP VM is used for all my corporate domain work and gets more use than the OSX-side which I use for everything else like browsing, email, etc.