not really... the first nvidia dual gpu card was from asus, based on 6800GT chips, and was bigger than any dual gpu card to date...
since then asus has created several REAL monster cards... all nvidia dual gpu cards dont look monstrous at all to me...
they are SLIGHTLY longer than normal cards, thats all... asus dual gpu cards are HUGE and have massive heatsinks and the best of the best components...
while nvidia tends to use cut down gpus and mainstream components, not the best of the best... i wouldnt call that a monster card, but thats just my opinion...