He meant 9 and DOWN. He clarified that later on when i asked.
Yea sorry, I should've been more clear and said anyone outside the Top 8. But I agree with what you are saying, guys like Edgar, could do fine getting back to the top of their division, I wouldn't know the difference though in a weight class so low. When I've fought at 145 and 155 I wouldn't say either was stronger or faster than the other, the only real significant difference I've felt while competing was against a wrestler who felt really strong and it was at 145 but he physically felt more powerful than any one I have ever competed against.
I guess it's about eliminating potentials for guys like Edgar and Machida. Neither has been horribly out muscled consecutively in fights, but dropping a weight class just eliminates the possibility of dealing with it. It won't be easy at the top of any division, but I guess in terms of threats, if you can cut the weight, you'll help get away from some of the physical struggles you faced with bigger guys, whether it's punching power, getting controlled, etc