First off, the Spanish spoken in that chat is definitely not Chilean.
Also, you know why he said he would "say it wasn't him?" That's the easiest way to impersonate someone. I make the name Kirjava, and say a bunch of idiotic things, than say "Hey, if anyone asks me later about this, I'll just deny it was me." This is an obvious tactic, because when people really do talk to you about it, you ARE going to deny it. But, since I already stated that, it will only confirm that it is you. And you guys are falling into this trap, so easily.
Another thing, is that while playing with some SS cubers on TTW, Nakaji1084 logged on, getting avgs of 10secs. I asked him about Monster Hunter, and he had no idea what it was. Obviously it wasn't the real Nakaji (the real one plays Monster Hunter), and everyone started asking him about it. He instantly confessed that it wasn't him, since it was very obvious after his mess-up.
It's very easy to impersonate anyone on TTW, and get away with it. To think that anyone on there, especially if they're a famous cuber, is who they say they are, is ignorant. (unless you've had the real cuber tell you so from a source that you know is them.)