(I know I promised not to come back to this thread, but I'm not talking on the topic of XP here....

)
In fact, I am using that MBA to type this post. When it gets a bit hot, the kernel starts taking back CPU cycles in order to cool it down. As a result, any application you are using starts running like a dog.
As I've said before, you've got a very Apple bashing slant to your posts Andy.
I've no idea what you're doing to your poor MBA if "it gets a bit hot" just because you are posting on PPRuNe. Seems to me like you're looking for problems where none exist... aka spreading FUD.
I've extensively used and dealt with others who have used every laptop out of the sun. Apple laptops are consistently better than your
average PC laptop, as I said earlier, if you go higher up the PC range, then of course the spread narrows and you get some decent products on the PC side... although I'd still have an Apple any day... in my experience they're far more reliable. I push my personal Apple devices very hard indeed and have had never had major issues at all.