I have been able to withdraw 40+ BTC multiple times without any issues. They were always processed almost immediately with a transaction being broadcast prior to the next block being found. The only delays I have ever experienced with them was during the stress tests however I believe that was due to the unavailability of confirmed unspent inputs.
Their number and severity of problems is small IMO
There is similar long time of history, when everything with mtgox is right. However, from some time the mtgox started to show very risky signals, and less than one year later, it collapsed.
When the very risk signals start to appear I will start to worry and sell.
Until now, I don't think there is enough evidence to justify panic or fear about another gox event