as much as i think GSP will get the UD no matter how many rounds, i went with "not happening". the athletic commissions have a rule about fighting a maximum if 5 five-minuet rounds in a single night and time limit of 25 minuets if i remember correct(feel free to correct me because i am not 100% sure). thats why we dont see tournaments anymore. i think you were kind of just speaking hypothetically, so i was just speaking in real world term. if they could fight a 7 rounder, i think GSP's cardio is just as good as diaz's if not better. i think georges is a better athlete than diaz could ever be. just my opinion.
EDIT: i tried to prop you but have to spread the love, anyway, good job on all the posts lately, very few new guys get this involved