Of course you're joking about Quinteros "forgetting" to castle (in the game with Mecking in post #13). But I don't think he really had the opportunity, once he decided to play 8..Bh6. I thought this made no sense, trading a B that was likely to be useful on the kingside for white's undeveloped bishop. Why didn't he just put it on the obvious square g7 and put his knight on f6, with a KID type set-up? He must have had something else in mind, or, more likely, my suggestion has big flaws in it. Anyway, after the knight recaptures 9...Nxh6, there's no way it wasn't going to be driven back. I suppose after 10.h4, black could have tried ...f5, and if 11.Qd2 f4, trying to close it up, and then maybe O-O. But it looks terrible. At some point early on, black should have got in a6. Hindsite's 20-20.....

thats what i was thinking . where is pfren?

I did realise the transposition was possible, I didn't realise that it's considered to not give Black any trouble. I spent a few days trying to find information about this variation. In my own games, I have scored very poorly from that position.

I've had trouble playing the Black side of this position, especially when White follows the game Anand-Morozevich line. I think it looks good for white.

But I'm willing to learn. What did Morozevich do wrong in this game?  I was never thrilled with Moro's 10...Ne5, but I had a game as Black where I was suffocated after 10...Be7. Is there a model game for Black in this variation?

Regardless of whether 3.c4 is best for white, I don't think c3 is a panacea either though. Polgar was able to get a very comfortable position in the game I mentioned earlier.

I forgot to mention...

In 2006, Alexander Khalifman argued that White should play the Maroczy bind with Bd3 and f4 against the Paulsen-Kan in OFWAA 8. He argued that White has greater space and freer development. He suggested that White should be able to prove his advantage with careful planning rather than by a specific move order.

However, he recommended

which "emphasizes the unstable placement of his opponent's queen on c7, since Black has not managed yet to place his pawns on a6 and e6."