QED. People are reluctant to send their coin to Gox to trade for Fiat because it is extremely difficult to actually take possession of the Fiat. A continuously rising percentage of small trades appears to be leaving Gox for other exchanges. The whales are still there because no place else can really accommodate them. Yet.
But all the slow withdrawal process means is delayed profit. If you have a lot of capital even doing this once will earn you quite a bit which you'll have in a month or two. I'd sure do it if I had access to that kind of money to spend on BTC.
Or has trust that Mt.Gox will pay you at all already died?