VERY little. In fact the ONLY thing he "revealed" was the bit about Galactus being a cloud. The only way we'll know he ws telling the truth is if this turns out to be the case. However if that is NOT the way Galactus appears in the movie, he couldjust say that they just hadn't finished the effects when he saw it.
To me he appears to be using the same tactic that psychics use to con money out of suckers all the time. Throwing out vague general comments that could be true over a broad spectrum of possibilities: "I see you've been thinking about making some changes in your life." "Why, yes! How did you know?" Because EVERYONE is ALWAYS thinking about some change or another they'd like to make.
This guys comments - Reed and Sue still boring (opinion he could continue to claim after the movie comes out because it is a statement based on...opinion), Surfer and Torch have some decent scenes (anyone who's seen the trailer could make his observation) - with the exception of the Galactus comment (which i've already stated how he could explain away in its absence), are the same way: vague, general comments that anyone could have come up with. I could say I've seen the movie and that there is one scene where Johnny plays a pretty funny prank on Ben. Not too hard to believe because he did that in the first film and we know that they have a history of this sort of thing (so odds are there WILL be some scene like this in the film) AND if it there isnt a scene like this in the film I could just say that it must have been cut from the final vrsion.
And before you say it, I also don't know what reason he'd have to try and BS everyone. But as long as we've been on these boards, we KNOW that there are people who DO this sort of think, maybe just to screw with everyone. More than that, I don't see a reason why he wouldn't jut go ahead and tell it all if he actually saw it. Unless he was the only person to have seen the rough cut, how could he (as an annonymous internet poster) possibly get himself or his friend in trouble?
I too was one of the few who blasted lakiami's naysayers who ran him away from the boards. But the reason I believed him ws because he did provide details. This guy made comments that anyone who put a little thought into it could have made.
Time will tell. If Galactus does in fact turn out to be a purple cloud, I will gladly admit i was wrong. Until then I call BS unless he lays out more details.