Jeff, but especially Brad, understand the meta-game that goes into these GOTY deliberations. Its less about stating your opinion, and more about effectively taking down the competition, even if you don't personally feel that way 100%. Just compare the 2010 GOTY deliberations with Mass Effect 2 to this year's about 3. They're using the exact same arguments, only Brad and Jeff have switched places. It gets to a point where in 2010, Brad completely predicts how Mass Effect 3 turned out in his attempt to take down 2.
Its what makes the deliberations so entertaining to listen to, as otherwise you'd just have a straight up-and-down vote with no fanfare.