I thought that Ralphie's last set was brilliant. Based on their final performances (which didn't count towards the vote), I would have picked him over Dat.
DW Sue made an interesting comment about Dat Phan. All he has to do is drop into his stereotypical Vietnamese "accent" and anything that he says gets a laugh. To me, that's not comedy. Ralphies rant on fat/skinny people was inciteful and extremely funny.
DD Sarah accurately predicted the voting order of the finalists. I can't watch TV with her. She always seems to know the outcome.
When I saw Dat go against Dave a few weeks back, I got the sinking feeling that he was going to win. Who knew?