It depends on how good Dyack thinks his game is, if it's supposed to be the best game that comes out this year then it has to beat GTAIV's metacritic score of 98 and MGS4's 94, if we take him literally then Dyack's game has to be better than the rest of the games coming out this year even if he doesn't want to be compared to GTAIV or MGS4, the only other big games this year are basically Gears and Resistance 2.
Frankly I find it rather disingenuous to propose a bet and then tell the other side "not to set the bar too high so I can win otherwise you show your true colors", it's like someone tells you he'll punch you in the face and then you can hit him back but not too hard because he doesn't want to be knocked out and lose the fight, you have to make it so that you give him a good chance to win otherwise he labels you as having a predisposed motherfucking bias, that kind of shit is just CRAZY.
Evilore is manning the fuck up and putting up the dough, he can set the bar as high as he wants, there's no need to resort to kids gloves, reasonable developers don't fucking go to forums and telling people if you're not for my game I'm going to fucking own you when it comes out and if the press thinks it's as good as I want them to think.