Well i was always under the impression that you could wire *in* to Gox even from the USA
You just couldn't cash out to USD ...
False?
Well, yes, but how long does that take? The longer it takes, the more likely it is withdrawals will be restored and you no longer want your money in there.
The minute withdrawals are restored, the gap will be gone. The gap you see now is because of people thinking Bitcoin is doomed, or that it would be easier to get EUR/USD out of an insolvent Gox than BTC.