"Well, d'uh, of course it was good news. The worst run exchange in the BTC ecoystem *finally* went down. That's what brought us to the new ATH of 6000."
I don't strongly agree or disagree with anything your saying except this. gox being gone is not going to lead us to $6000 per bitcoin, or really any rise in price, lol. Not one person invests in bitcoin because gox is gone. gox probably wouldn't stop anyone from investing in bitcoin until now. Maybe some people will celebrate by buying a little for the good occasion, but it is no reason to make the price go up.
You completely misunderstood my point. Mtgox closing is not the "reason" for reaching (hypothetical) 6k coins. Nothing is ever the reason, besides market psychology (and fundamentals, as seen through the lens of market sentiment). The point is that, if we reach a new ATH, I'm sure people will look back at Mtgox closing and quoting it as "one of the reasons", just like they now quote "SR closed" or "the Chinese came in" as *the* reason, when in reality those are factors influencing the price, but never in such a straightforward and obvious way as it is made out to be in retrospect.