If Dan Hardy defeats Georges St.-Pierre at UFC 111 will it be the biggest upset ever?

Dan Hardy is an impressive fighter but no where near the level as GSP. I can't even think of an area where Dan Hardy has an advantage. Possibly standing up but even there GSP can adjust and do what necessary to win the fight. I think this would be even bigger than the Matt Serra fight and would blow my mind if Dan Hardy came out of the cage with the belt. What do you guys think?