I am a bit surprised about the fact that everybody is talking the exotic materials. The hulls from the boat i sailed are normal standard build hulls with no exotics like carbon in it. The boat of Geert ( 109,7 kg 2007 Blade ) is a normal glass material build boat with alu mast, so this boat is only 2,7 kg above minimum weight ( 2 up ).
The Aussie Blade is build with Kevlar with an Alu mast and weighted 111 kg , but this was the first boat from the mould, so the builders did a great job because everybody knows the first boat is always a bit heavier then further on in the production process.

Regards,
Hans