They've got a point, but...
They twist the facts a bit! Think about this: Apple Macbook; who can be a contender?
1. Similar specs.
2. NOT made of plactic; repeat: NOT made of plastic
What's left outside Apple? Sony Vaio Z/TT/something of this series; Thinkpad X301, don't know about any others. I guess Voodoo Envy would qualify -> isn't it from carbon fibre? Oh, and Dell Adamo, and probably some more.
All those computers are very expensive. With Apple education discount in UK, baseline Macbook is CHEAP; I mean seriously CHEAP. There's hardly any laptop that can compare!