It may come to that but the other exchanges look to be even worse...they make it more difficult to get your money into them and also less volume so less liquidity...bid/ask spread is smaller too. MtGox sucks but it may be the best option at the moment.
MtGox have had 3 years to get their shit together. I am not persuaded they will succeed, ever.
Why not give the other exchanges a chance to prove themselves and improve? We know what Gox does with their commission fees, hundreds of thousands of dollars: They piss it away without improvement.
They've been down 3 days, more or less. What more do you need to leave?
"The other exchanges don't have any volume, so I wont give them any of my volume".... How's that working for you?