I remember commenting about him saying that he thought that it would be better if Miaymoto would create a new female "lead" to replace Krystal, which should resemble Mario & Peach/Link & Zelda style relationship. I said "If Miaymoto would design a new female character it would most likely be just a damsel in distress again, haha". After that I just said why I would want Krystal to smash, how I'd just simply want more Star Fox characters to smash. I said I would also like to have Wolf of course, but if I had to choose between a new fighter and a veteran, I would choose something new. Then I just specified that her staff would make her the most interesting new addition from the SF characters.
I don't really remember what the other two said, I only saw alfores comment, but that was also just a civil comment of him stating his opinion of why he would like to have Krystal in smash and proving the person, who was bashing on Krystal fans, that he's being silly and wrong.
And about the guys age, it's possible that he's really 29 (which would make all this really sad if you'd asked me >_>), but it's most likely a kid pretending to be Fox, because it's his favorite character or something. I'd rather think that it's just a kid who doesn't know any better and would grow to be smarter in the end, rather than some thirty year old man child who never grew...