I don't see the relevancy to today's Bitcoin price? Presumably MtGox was able to execute the fake trades because they didn't have to provide the money for it? It was simply a number in the database, if the dollars couldn't actually be withdrawn?
Sure, another market could try to pull the same stunt, but do they even have the same scale nowadays? There are many more markets than at the time of MtGox.
I don't think many people claim this things can happen in such scale any more.
I see this article as an additional proof that the spike back then was caused in large part by the ponzi scheme MtGox was.
(Having said that, there were also other good news back then that helped the price - like the hearing in US Senate regarding crypto, that went very well)
Sure, another market could try to pull the same stunt, but do they even have the same scale nowadays? There are many more markets than at the time of MtGox.