Not nearly as much as Mt Gox had. I am guessing it has about the same volume as BTER has had before the hack. After all this is an alt coin exchange, not the main Bitcoin exchange that whole world is using. I am guessing that when Cryptsy goes down, it will lose about 5,000 BTCs, more or less!
That's still a considerable sum - at today's market rates it's about 1.8 million USD. Exchanges have always bothered me - unlike traditional financial institutions they have more incentive to scam (usually because control over assets is exerted by one or few people) and that there is no legal recourse should they scam. Not to mention, it's not worth the effort to try and recover a few thousand dollars.