It's an April fool... It just happened that the events "look" similar to that post. In reality, the panic sell was not related. And Gox was not under DDoS when it fell. It is now today only because some people are trying to regain their money are try to drive the price down.
if im not wrong today mtgox said that they are under ddos attack (facebook)
Yeah most companies would lie and say that if they were making huge profits, failed to invest in infrastructure, and then were collapsing under their own success. A DDOS is an attack involving sending a lot of traffic. It behaves the same way as a website not under attack that is getting a lot of traffic due to success. Last night on Facebook they said there is no DDOS we are a victim of our own success. Sounds like they are trying to BS us to me.