I think it might actually be the guys from New Brutalism making those guitars. They've got really thin bodies. And I'm digging most of what I've heard from New Brutalism, too.
The EGC guitars weigh around 10 lbs. which is the same as a Les Paul custom I used to own.
I'll admit it's tough on my shoulders after a while but I'm more than willing to deal with it when playing my TB. Perhaps no crescent kicks on stage for me.
By functional, they mean nothing is there that shouldnt be...it all has a use. Heavy guitars dont bother me at all and to be honest I prefer to have a heavy one instead of a light one. They intended to have a solid aluminum guitar and with this it will weigh a good bit, but it makes it sound very cool.