I don't know - I have a hard time believing that this is a reaction to the MtGox news. I'm more inclined to believe that there is some insider information that we'll all learn about days/weeks/months later..
One would think that the Gox news was bullish as we are finding out after the fact and would explain the recent decline. Sure there is more selling to come from the trustee but those coins were always going to enter the market again at some point.