I find the weight of the Vociferator (think it's a bit under 9lb) if anything a touch on the light side for gigs. I find it gets naturally 'thrown around' a lot while I'm moshing. With me being a moderately big fellow, any smaller/lighter and it'd look like a toy. But thankfully it's not a toy and is just about heavy enough :)
It feels very odd to pick up my Ibanez now (not that I often do, mind). Just feels as though there's nothing there, which doesn't feel very stable when you're mashing the strings like the Monkey Boy I am. I think that's why I prefer a much heavier guitar.