It is important to remember that the mtgox btc valuation is artificially high because of them being blacklisted by as much of the fiat banking system the USG can influence. So, transferring the btc to another exchange and selling it is only realizing what the btc are really worth.
Enough with the conspiracy theories. Mt. Gox's troubles are due to Mt. Gox.
This has been going on for months. If Mt. Gox really wanted a high-volume banking arrangement, they would have found one by now. But they seem to find having excuses for non-payment more useful. This suggests they don't have the depositors' money.