I never even considered shoe weights before reading that article. In fact I don't recollect ever seeing weights of shoes quoted before. But I happened to be reading this on the laptop in the kitchen... so... just weighed my Scott World Cup shoes (which are pretty racey and I thought would probably be light) on the kitchen scales and the pair weighed 1100g for a UK size 10.
That's about a pound difference in weight over the S-Works shoes which I guess if you're a weight-obsessed XC racer - which I'm not - is quite a saving.
Well there you go. You learn something new every day.