It's virtually impossible to get money out of Gox, and when you can it is taking many, many weeks. The Gox price is now 20% above any other exchange as well, so the price too is irrelevant.
I have no direct experience but this to me is a myth in danger of attaining legendary status.
Mt-Gox update from 4th JULY (6weeks ago)
'Mt. Gox is happy to announce that global account withdrawals have now fully resumed as of today...'
'Progress in the Previous Two Weeks
While we announced that there would be a temporary hiatus on withdrawals, during our testing over the past two weeks we managed to process over $1,000,000 USD to customers. As this required a great deal of manpower and was not a perfect solution, we are quite happy with the progress made despite the conditions.'https://www.mtgox.com/press_release_20130704.htmlOntop of that EURO withdrawls have been available throughout although you do see some people complaining they waited a few weeks. It is entirely possible to withdraw Euros and convert to USD. With MTgox prices 10% higher I fail to see how that wouldn't make sense. It's not going to cost 100k to carry out the process.
edit: And how do we know big sellers don't get priority treatment from Gox? For a nice fee they might be able to pull leavers for super big clients.