Our money was lost the moment we decided to transfer it to a third party. That 1/5 probably won't recover very much of it, if any of it, for reasons explored in that thread.
Whether it's Mt. Gox or Coinbase, money we put into a webwallet is no longer ours. It's the legal entity's. If they go bankrupt, which can happen for a variety of reasons, sometimes unfair ones, then that money is gone. Best magic trick ever.
Try to be at peace with the loss. Easier said than done; it was difficult for me. If you need someone to talk to, please feel free to shoot me an email.