Athleticism is all well and good IC. But I'd like to point out the 'small' fact that athleticism only rarely wins in the face of overwhelming power. If you were to pit two big slow guys... say Khali and Mark Henry nowadays. And put them against the likes of Evan Bourne and Rey Mysterio, well, can you honestly say that the athleticism of two very fast, high fliers would overcome the power?
No, because in order to inflict damage, they have to come close, and some time, they're going to get caught. And then the pace slows and it's a power game. And the little guys tend not to be able to take the big men's power quite as well as the big men can absorb what the small men dish out.
As I've pointed out... show me a team of big heavy guys that the Guns have defeated. I'm not going to wait for a reply, simply because in the smarky world of TNA and ROH that the Guns inhabit, guys like Akeem and Boss Man don't exist (aside from the fact that they're dead). Why? Because (say it with me) 'You Can't Wrestle' rules the day in said federations