Re: More Suggestion than Paul McKenna
There is always someone who wants to knock the facts when Apple turns up trumps.
It's not difficult to install Windows on a Mac with bootcamp and also run Parallels in parallel. The instructions are simple and advice is all over the Internet.
Question why people do this, well you get the best of both worlds, with a Win7 install you don't have to lose all your existing software if you buy an Apple computer.
The difference is also probably due to the fact that Windows computers are made by so many manufacturers, if you look at the reviews comparing them, some are good and some not so good, some are high end and some are low end, some have quality components some have generic parts.
So it is not a surprise.